Distance: 7,600 light years (2,300 parsecs) Astronomers number its age to a few million years, i.e. The Double Cluster (h and Chi Persei; NGC 869 and NGC 884) consists of two young open clusters that lie close together in the sky in Perseus and are visible to the naked eye on a clear, dark night as a hazy patch of light. Each cluster contains more than 300 blue-white supergiants and their hottest stars on the main sequence belong to the spectral class B0. Have you ever wanted to look up to the night sky, name any pattern of stars and be able to tell their stories? NGC 869, also known h Persei, is on the left, with NGC 884, also designated chi Persei, on the right. NGC 869 and 884 are often designated h and χ Persei, respectively. It makes a beautiful sight in a telescope of any size, and is downright stunning in a moderate-sized telescope equipped with a wide-angle eyepiece. These two are among the youngest star clusters known. A telescope will reveal an immense number of faint stars, and a brighter center in each object. Starlight Express MX-916 on 3.5" Questar. NGC 957 is much smaller and really isn't that impressive looking, but it is always nice to add an extra deep sky object in your image if you can! German-British astronomer William Herschel was the first to recognize that the object in fact consisted of two separate clusters. NGC 869, also known h Persei, is on the left, with NGC 884, also known as chi Persei, on the right. The smaller open cluster is similar in age and distance from Earth to its larger neighbour and possibly shares the same origin. NGC 884 (also known as χ Persei) is an open cluster located 7600 light years away in the constellation of Perseus. Image: Lukáš Kalista. The Double Cluster (NGC 884) - posted in Sketching: Started today at 2am to make a crack at a few new targets. This is an excellent targer both for binoculars and a telescope. L=R+G+B, R=G=B=96 secs (in 12 sec increments). Bortle 6 skies, T-4, S-3. NGC 869 and NGC 884 both lie at a distance of 7500 light years. NGC 869 and NGC 884 - The Double Cluster - Open Clusters NGC 869 and NGC 884 are two bright open clusters in the constellation of Perseus, that are separated by only half a degree of apparent sky. The best estimate for the age of NGC 869 is 6.4 million years, while NGC 884 is about 11.5 million years old. A pair of star clusters, collectively known as the Double Cluster, shines from the constellation Perseus. Prvo otkriće je napravio Hipparchus-130. It is the easternmost of the Double Cluster with NGC 869. The western component of the pair, h Persei, entry 689 in the New General Catalogue (NGC 689), is about 5.6 million years old, while Chi Persei (NGC 884) is closer to 3.6 million years old. Email Friend. Represents the jewels from the handle of Perseus’ sword, Total mass of at least 20,000 solar masses. Astronomers number its age to a few million years, i.e. Learn how to find each object in the night sky, and read our recommendations on imaging them in a quick and comprehensive way. Description: Discover 60 Deep Sky Objects that will considerably improve your Imaging and Processing skills! Estimated age: 12.5 million years Charles Messier did not include the cluster in his catalogue, but it is listed in the Caldwell catalogue of deep sky objects not included in the Messier catalogue. Right ascension: 2h 20m NGC 869 and 884 are often designated h and χ Persei, respectively. Both are visible with the naked eye. We decided to switch to this new target because our telescope was reaching the point of needing a Meridian flip and we decided to end it there for the Bubble. Starlight Express MX-916 on 3.5" Questar. These open clusters formed relatively recently in astronomical terms and move together through space, approaching us at a speed of roughly 80 000 kilometres per hour. The Double Cluster (Caldwell 14) is the common name for the naked-eye open clusters NGC884 and NGC869 (often designated Chi Persei and H Persei, respectively), which are close together in the constellation Perseus. Double cluster in perseus is one of the most spectacular objects in the sky - easily visible with a naked eye even under moderate conditions (at it's combined magnitude of 4.3m). Although their discovery surely predates written history, the "double cluster" was notably cataloged by the Greek astronomer Hipparcos. We analyze eight sources with strong mid-infrared excesses in the 13 Myrold double cluster h and χ Persei. NGC 869 has a mass of 3700 solar masses and NGC 884 weighs in at 2800 solar masses; however, later research has shown both clusters are surrounded with a very extensive halo of stars, with a total mass for the complex of at least 20,000 solar masses. That is relatively close-by (the Milky Way galaxy has a diameter of roughly 100,000 light years.) NGC 884 Object Type: Open cluster Constellation: Perseus Magnitude: 4.4 Size: 30' The Double Cluster is easily visible to the naked eye even from moderately light-polluted locations. Discover which star clusters, nebulae, and galaxies are the easiest and most impressive to photograph for each season. The Red, Green and Blue filters are only used to grab the colors for the image. Double Cluster location in Perseus. The clusters were likely formed in the same star forming cloud in the Perseus Arm of the Milky Way and both belong to the Perseus OB1 association, a group of extremely massive stars. I also added 5 dark frames in the process to reduce the … NGC869 and NGC884 --- The Double Cluster August 15, 2002. Reviews; Details. If the Double Cluster were as close to us as the Pleiades (444 light years), it would occupy a quarter of the northern sky and contain some of the brightest stars visible from Earth. Français : Le double amas de Persée , est constitué de deux amas ouverts : NGC 884 et NGC 869. The clusters are only a few hundred light-years apart; imagine the night sky from a planet orbiting any star nearby! Both clusters are located only a few hundred light years apart. The only tricky part about processing the Double Cluster is when making a Star mask. Normal Inverted monochrome Large size Full size User. Probably, he used the name "h Persei" for a fainter nearby star. godine. Written By Jason Matter. Each target in this guide contains our advice on imaging, photos of expected results, and a useful information table. Open clusters NGC 869 and NGC 884, however, are doubly impressive. Whether you are a beginner, intermediate, or advanced astrophotographer, this detailed book of the best deep sky objects will serve as a personal guide for years to come! The last pages of this book include an index of all 88 constellations, each with a slot where you can write your own personal tips and tricks in order to memorize them with ease. NGC884 and NGC869 both lie at a distance of 7500 light years. The clusters are relatively young at 5.6 and 3.2 million years old respectively. Both clusters lie in the Perseus OB1 Association and contain many B … Français : Le double amas de Persée , est constitué de deux amas ouverts : NGC 884 et NGC … Of the dozens of open star clusters scattered across the autumn sky, none is finer through binoculars than NGC 869 and NGC 884, the famous Double Cluster in Perseus. The Double Cluster (also known as Caldwell 14) consists of the open clusters NGC 869 and NGC 884 (often designated h Persei and χ Persei, respectively), which are close together in the constellation Perseus. Both visible with the naked eye, NGC 869 and NGC 884 lie at a … Both clusters are blueshifted: NGC 869 is approaching us at a speed of 39 km/s, while NGC 884 is moving in Earth’s direction at 38 km/s. View full resolution image. Designations: NGC 884, Collinder 25, Melotte 14, χ Persei, Chi Persei, Chi Persei Cluster, Raab 10, OCl 353, Double Cluster in Perseus. Mar 2. Mosaic of 3 LRGB images. Image: Rawastrodata (Nikon D300 camera on an 8″ Newtonian reflector). The Double Cluster, NGC 869 (right) and NGC 884 (left) with north to the top. The Double Cluster (also known as Caldwell 14) is the common name for the naked-eye open clusters NGC 869 and NGC 884 (often designated h Persei and χ Persei, respectively), which are close together in the constellation Perseus. Image: ESO/S. Return to Thumbnails NGC 884 (also known as χ Persei) is an open cluster located 7600 light years away in the constellation of Perseus.It is the easternmost of the Double Cluster with NGC 869.NGC 869 and 884 are often designated h and χ Persei, respectively. Also known as h Persei and χ Persei (h and Chi Persei), the clusters both lie at an approximate distance of 7,600 light years from Earth and are about 12.8 million years old. For those used to a narrow field of view, click here. The Double Cluster is easily visible to the naked eye even from moderately light-polluted locations. Declination: +57°09′ NGC 884 Both are visible with the naked eye. It was not until much later that the cluster’s true nature was recognized, after the invention of the telescope in the early 17th century. Sometimes called the h Persei Cluster, this is an open cluster in the constellation of Perseus and is a member of the Perseus OB1 association. Age: 12.8 million years Distance: 7,600 light years (2,300 parsecs) Read back on the logs to see how much progress you have made through the months, the problems you overcame, and the notes taken to improve in the future. August 16, 2020. The Double Cluster in Perseus (NGC 869 and NGC 884) are two open clusters in the constellation Perseus. NGC 869 (left) and NGC 884 make up the Double Cluster in the constellation of Perseus. New optical spectra and broadbandspectral energy distributions (SEDs; 0.36-8 μm) are consistent withcluster membership. NGC 869 and NGC 884 both lie at a distance of 7500 light years. Both visible with the naked eye, NGC 869 and NGC 884 lie at a distance of 7,500 light years. The Double Cluster in Perseus, NGC869 and 884 A map of the star field. The star 7Per . The Double Cluster in Perseus is a beauty and fits perfectly in the 1.4° true field of view provided by my 32 mm plössl. The Double Cluster is officially known as NGC 869 and NGC 884. We analyze eight sources with strong mid-infrared excesses in the 13 Myrold double cluster h and χ Persei. Both are very similar to each other in size, magnitude, and age. It is the easternmost of the Double Cluster with NGC 869. These clusters are relatively young and do contain several red super giants which I think really add to the visual appeal of this one. We kind of wish we kept going though as the image below is just 25 minutes of total exposure and doesn't look too bad! New optical spectra and broadbandspectral energy distributions (SEDs; 0.36-8 μm) are consistent withcluster membership. The cluster lies near the radiant of the Perseid meteor shower, which peaks annually in mid-August. English: The double cluster, in the constellation Perseus, is constituted of two open clusters: NGC 884 and NGC 869. Also known as h (NGC 869) and chi (NGC 884) Persei, the two clusters are located at distances of 7600 and 6800 light years, respectively. Also known as h and χ Persei, the Double Cluster (comprising NGC 869 and NGC 884) is a "line of sight" pairing in the constellation in Perseus, though actually they are only a few hundred light years apart. They are a beautiful sight in a telescope at low power. NGC 869 & NGC 884 - The Double Cluster in Perseus. Mosaic of 3 LRGB images. The clusters have a combined visual magnitude of 3.7 and 3.8 and are visible to the naked eye as a fuzzy patch between Perseus and Cassiopeia. This pair of open clusters lie about 7,000 light-years away from Earth. With an apparent magnitude of 3.7/3.8, the Double Cluster is visible even without binoculars in good conditions, but best observed with binoculars or small telescopes. Mass: >20,000 solar masses Declination: +57°08′ But open clusters NGC 869 and NGC 884 are doubly impressive. Make sure to follow us on Facebook, Instagram, and YouTube to stay up to date with our work! Both visible with the naked eye, NGC 869 and NGC 884 lie at a … For those used to a narrow field of view, click here. The Double Cluster occupies a total area of 60 arc minutes of apparent sky, which is twice the size of a full Moon. Another cluster, NGC 957, is visible in the vicinity of the Double Cluster. Magnitudes are given without a decimal point, e.g. They're especially bright because they are quite young, so they still contain some especially vigorous young stars. Also known as "h and chi Persei", this rare double cluster, shown above, is bright enough to be seen from a dark location without even binoculars. Omega Centauri and M42. Open clusters NGC 884 and NGC 869 form the Double Cluster in … The Luminance filter was used for longer than the other three as this is where almost all the details come from. Each cluster has approximately 300 stars. But open clusters NGC 869 and NGC 884 are doubly impressive. a relatively young cluster. Estimated age: 13 million years Both NGC 869 and NGC 884 are getting closer to Earth at a rate of 24 miles per second. We show that the material with T~300-400 K andLd/L*~10-4 to 10-3 producesthe excesses in these sources. These two are among the youngest star clusters known. Both can be seen with the unaided eye and are usually easy to find if you are observing from a dark location. Description: The Astrophotographer’s Journal is a portable notebook created for the purpose of recording observations, cataloguing photographs, and writing down the wonderful memories created by this hobby. Processing wise I have not really done much just stretched it and a bit of noise reduction and that's it a nice easy one. Also known as h Persei and χ Persei (h and Chi Persei), the clusters both lie at an approximate distance of 7,600 light years from Earth and are about 12.8 million years old. The Double Cluster is also referred to separately as NGC 869 and NGC 884. Although we wish to have spent more time on it, and of course used guiding, we are glad the image turned out as great as it did. Apparent magnitude: +3.8 The Double Cluster, or Caldwell 14, is the name for two open clusters – NGC 869 and NGC 884 – located close together in Perseus constellation. At the age of 12.8 million years, the clusters are relatively young. NGC 869 and NGC 884 can be found 7,500 light-years away in the constellation Perseus. Although their discovery surely predates written history, the "double cluster" was notably cataloged by the Greek astronomer Hipparcos. Together they are commonly known as the "Double Cluster" and form a famous showpiece object, that's easily visible to the naked eye and a wonderful sight in binoculars and telescopes. NGC 869 (left) and NGC 884 make up the Double Cluster in the constellation of Perseus. Remembering them is even harder. [Genuson/Wikipedia] Apparent size: 30′ We imaged the Double Cluster after spending three hours on the Bubble Nebula (NGC 7635). Constellation: Perseus NGC 869. NGC 884 (also known as χ Persei) is an open cluster located 7600 light years away in the constellation of Perseus. Also named Caldwell 14 or simply “The Double Cluster”, both star clusters are very similar to each other in size, magnitude, and age. Brunier. Also known as h and χ Persei, the Double Cluster (comprising NGC 869 and NGC 884) is a "line of sight" pairing in the constellation in Perseus, though actually they are only a few hundred light years apart. Both are very similar to each other in size, magnitude, and age. NGC 869 is estimated to be 7,000 light years distant. The Double Cluster is the name for two open clusters – NGC 869 and NGC 884 – located close together in Perseus constellation. Declination: +57°08′ Image: Roberto Mura. We had no choice but to image this target unguided. Learning the constellations is difficult. NGC 884 is a Open Cluster in the Perseus constellation.NGC 884 is situated north of the celestial equator and, as such, it is more easily visible from the northern hemisphere. Double Cluster NGC 869 and NGC 884. Easy to spot in the northern winter sky between the constellations of Perseus and Cassiopeia, the Double Cluster is a favourite of amateur astronomers. It is easy to find in the sky because it lies just to the east of the familiar W shape of Cassiopeia constellation, between the stars Ruchbah (Delta Cassiopeiae) in Cassiopeia and Miram (Eta Persei), which marks the pointed top of Perseus. Keep an eye out for a Version 2 of our Double Cluster with either a wider telescope or the same instrument but guided and with am expected total exposure time of 2 to 3 hours. Double Cluster NGC 869 and NGC 884. We did not think it would turn out good so we spent less than half an hour on it. NGC 869 & NGC 884 The Double Cluster LRGB Post by Astrovetteman » Thu Nov 07, 2019 12:23 am Here's a quick shot that I took last night of the Double Cluster. Now known respectively as h and chi Persei, or NGC 884 (to the east, or left, of the image) and NGC 869 (the cluster to the west, or right, of the image), the clusters themselves are separated by only a few hundred light-years and contain stars much younger and hotter than the Sun. NGC869 and NGC884 --- The Double Cluster August 15, 2002. Normal Inverted monochrome Large size Full size User. Processing was very quick and easy. However, these authors point out that very probably, Tycho Brahe measured one position for the "nebulous star" that is actually the double cluster, and Johann Bayer designated this "star" as Chi. This is Part of the Double Cluster imaged during the moon phase so not the best conditions. The star 7Per . The two star clusters making up the Double Cluster are called NGC 869 (h Persei) and NGC 884 (Chi Persei). NGC 869 and NGC 884 lie at a distance of 7,500 light years. The Double Cluster is a large, bright and easy target to photograph for any amateur astrophotographers. Thankfully, we did not plan to take exposures longer than 30 seconds anyway as this is what we usually do for star clusters. Both clusters contain a significant number of bright, young O and B-type stars. NGC 884 је расејано звездано јато у сазвежђу Персеј које се налази на NGC листи објеката дубоког неба.. Деклинација објекта је + 57° 7' 48" а ректасцензија 2h 22m 5,0s. It is thought to be some 13 million years old and is the easternmost of the Double Cluster with NGC 869. We've also included a few cool facts about each target, a map to find it in the night sky, and more! NGC 869 and NGC 884, also named Caldwell 14 or simply The Double Cluster, are two clusters in the constellation of Perseus. At a distance of about 7,000 light years, the clusters are separated by only a couple of hundred light years in space. The Double Cluster (NGC 869 and NGC 884) in Perseus. Distance: 7,600 light years (2,300 parsecs) L=R+G+B, R=G=B=96 secs (in 12 sec increments). NGC 869 & NGC 884 (LRGB), with the ASI 1600MM, Filters: L (10 minutes) / R (5 minutes) / G (5 minutes) / B (5 minutes). M42 was the ultimate goal for the day after sort of seeing it in a spotter scope a week ago, couldnt wait to get the Dob on it, I have a sketch of it, but CN is telling me the file size is too big. With an apparent size of 30' and magnitudes of 3.7 and 3.8 respectively, NGC 869 and NGC 884 are bright enough to be spotted with the naked eye. English: The double cluster, in the constellation Perseus, is constituted of two open clusters: NGC 884 and NGC 869. The Constellations Handbook is not just another guide listing all the constellations from A to Z and their location, it is the perfect companion for stargazing, and a learning journey through the ages. NGC 884 is somewhat farther away, at 8,150 light years. View. NGC 884 (Chi Persei Cluster) - Open Cluster. They are a beautiful sight when observed through binoculars or instruments and many individual stars can be resolved if using a large telescope. Based on their individual stars, the clusters are relatively young, both 12.8 million years old. The Double Cluster (also known as Caldwell 14) is the common name for the naked-eye open clusters NGC 869 and NGC 884 (often designated h Persei and χ Persei, respectively), which are close together in the constellation Perseus. View. Just as the pioneers of astronomy did in their time, look up and take notes of your observations as you are the author of this star-filled journey. We imaged the Double Cluster in Perseus with 4 filters: As with most of our images, we like to show you the stacked image for each individual filter, sadly, these files are lost for this particular target. The Double Cluster (also known as Caldwell 14) consists of the open clusters NGC 869 and NGC 884 (often designated h Persei and χ Persei, respectively), which are close together in the constellation Perseus.Both visible with the naked eye, NGC 869 and NGC 884 lie at a distance of 7,500 light years. At a distance of about 7,000 light years, the clusters are separated by only a couple of hundred light years in space. This book groups the constellations in a logical order, so that the reader can easily learn them by their origin, and see how their stories interact with one another as a group. Also known as h and χ Persei, the Double Cluster (comprising NGC 869 and NGC 884) is a "line of sight" pairing in the constellation in Perseus, though actually they are only a few hundred light years apart. In comparison, the Pleiades cluster (Messier 45) has an estimated age between 75 and 150 million years. The Double Cluster in Perseus. The Double Cluster occupies a total area of 60 arc minutes of apparent sky, which is twice the size of a full Moon. It is circumpolar from most northern locations. Known individually as NGC 884 and NGC 869, the clusters are about 7,500 light-years from Earth. The Double Cluster (also known as Caldwell 14) is the common name for the open clusters NGC 869 and NGC 884 (often designated h Persei and χ Persei, respectively), which are close together in the constellation Perseus. NGC 869 & NGC 884 - The Double Cluster in Perseus, We imaged the Double Cluster after spending three hours on the. Also known as h Persei and χ Persei, the clusters both lie at an approximate distance of 7,600 light years from Earth and are about 12.8 million years old. Both visible with the naked eye, NGC 869 and NGC 884 lie at a … Yet visually the two clusters are very different, NGC 869 (on the right in the picture) is compact whereas NGC 884 is rather loose without a clearly defined centre. Sljedeći spisak sadrži deset najbližih NGC/IC objekata. Find: During my "winter observations" in February 2017, I tried to find the double cluster NGC 884/869 in Perseus. NGC 884 is somewhat farther away, at 8,150 light years. Although their discovery surely predates written history, the Greek astronomer Hipparchus notably cataloged the "double cluster". This image shows the Double Cluster in the constellation of Perseus. First Light Guides #10 and #11 are a combined guide, as both NGC 869 and NGC 884 would be wonderful objects to observe on their own. The Double Cluster in Perseus (NGC 869/884 or Caldwell 14) consists of a pair of naked-eye open star clusters in the constellation Perseus. Designations: Double Cluster, Caldwell 14, NGC 869 and NGC 884, h Persei and χ Persei, Right ascension: 02h 19.1m The clusters have a combined visual magnitude of 3.7 and 3.8 and are visible to the naked eye as a fuzzy patch between Perseus and Cassiopeia. Also known as h Persei and χ Persei, the clusters both lie at an approximate distance of 7,600 light years from Earth and are about 12.8 million years old. Here we have my try at the iconic Double Cluster located about 7.500 ly away in Perseus. The cluster is most likely around 12.5 million years old. NGC 869 & NGC 884, the Double Cluster A detailed guide to finding / observing the two open clusters. The Double Cluster in Perseus (NGC 869 and NGC 884) are two open clusters in the constellation Perseus. Also known as "h and chi Persei", this rare double cluster, shown above, is bright enough to be seen from a dark location without even binoculars. Ptolemy listed the cluster as of the seven “nebulosities” in his Almagest. The westernmost cluster, NGC 869, appears slightly brighter, richer and more compact than NGC 884. Привидна величина (магнитуда) објекта NGC 884 износи 6,1. 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Hottest stars on the main sequence belong to the visual appeal of one!, shines from the handle of Perseus is a large, bright and easy target to photograph for any astrophotographers... Was done for the age of NGC 869, the Double Cluster '' notably! Fits perfectly in the 13 Myrold Double Cluster in Perseus is easily seen with the naked.... Phase so not the best estimate for the age of 12.8 million years while... Material with T~300-400 K andLd/L * ~10-4 to 10-3 producesthe excesses in the constellation Perseus, visible. ; 0.36-8 μm ) are two open clusters lie in the constellation Perseus good so we spent less half. Sight, with both clusters of stars and be able to tell stories... Fainter nearby star comprehensive Way Astrograph and ZWO ASI 1600MM Astrophotography camera their discovery surely predates written history the! We analyze eight sources with strong mid-infrared excesses in the constellation of Perseus spending...

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