The Double Cluster, NGC 869 (right) and NGC 884 (left) with north to the top
Observation data (J2000 epoch)
Right ascension
02h 19.1m[1]
Declination
+57° 09′[1]
Distance
7.5 kly[2] (2.3 kpc[2])
Apparent magnitude (V)
3.7[1]
Physical characteristics
Radius
33.15 ly
Estimated age
14 Myr [2]
Other designations
Caldwell 14, Cr 24,[1] Mel 13,[1]
h Per,[1] h Persei[1]
Associations
Constellation
Perseus
See also: Open cluster, List of open clusters
NGC 869 (also known as h Persei) is an open cluster located 7460 light years away in the constellation of Perseus.[2] The cluster is about 14 million years old.[2] It is the westernmost of the Double Cluster with NGC 884.
NGC 869 and 884 are often designated h and χ (chi) Persei, respectively. Some confusion surrounds what Bayer intended by these designations. It is sometimes claimed that Bayer did not resolve the pair into two patches of nebulosity, and that χ refers to the Double Cluster and h to a nearby star.[3] Bayer's Uranometria chart for Perseus does not show them as nebulous objects, but his chart for Cassiopeia does, and they are described as Nebulosa Duplex in Schiller's Coelum Stellatum Christianum, which was assembled with Bayer's help.[4] The clusters are both located in the Perseus OB1 association, a few hundred light years apart from each other. The clusters were first recorded by Hipparchus, thus have been known since antiquity.
The Double Cluster is often photographed and observed with small telescopes. The clusters are visible with the unaided eye between the constellations of Perseus and Cassiopeia as a brighter patch in the winter Milky Way. In small telescopes the cluster appears as an assemblage of bright stars located in a rich star field. Dominated by bright blue stars, the cluster also hosts a few orange stars.
^ abcdefg"NGC 869". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2006-12-22.
^ abcdeCurrie, Thayne; Hernandez, Jesus; Irwin, Jonathan; Kenyon, Scott J.; Tokarz, Susan; Balog, Zoltan; Bragg, Ann; Berlind, Perry; Calkins, Mike (2010). "The Stellar Population of h and χ Persei: Cluster properties, membership, and the intrinsic colors and temperatures of stars". The Astrophysical Journal Supplement. 186 (2): 191. arXiv:0911.5514. Bibcode:2010ApJS..186..191C. doi:10.1088/0067-0049/186/2/191. S2CID 16454332.
^Stephen James O'Meara and Daniel W.E. Green, 2003, "The Mystery of the Double Cluster", Sky and Telescope, Vol. 105, No. 2 (February 2003), p. 116–119.
^Morton Wagman, Lost Stars, McDonald & Woodward, 2003, ISBN 0939923785, p. 240.
NGC869 (also known as h Persei) is an open cluster located 7460 light years away in the constellation of Perseus. The cluster is about 14 million years...
Cluster (also known as Caldwell 14) consists of the open clusters NGC869 and NGC 884 (often designated h Persei and χ (chi) Persei, respectively), which...
constellation of Perseus. It is the easternmost of the Double Cluster with NGC869. NGC869 and 884 are often designated h and χ Persei, respectively. The cluster...
objects, such as the Hyades, the Double Cluster (NGC869 and NGC 884), and the Sculptor Galaxy (NGC 253). The Messier catalogue was actually compiled...
The best known example in the Milky Way is the Double Cluster of NGC869 and NGC 884 (also known as h and χ Persei), but at least 10 more double clusters...
photometric search for peculiar stars in open clusters. V. NGC 2099, NGC 3114, NGC 6204, NGC 6705 and NGC 6756". Astronomy and Astrophysics. 412 (3): 721–725...
hypergiant located near the Double Cluster in Perseus, north of the cluster NGC869. It is a member of the Perseus OB1 association and one of the largest known...
magnifications. Some open clusters, such as the bright double cluster (NGC869 and NGC 884) in the constellation Perseus, and globular clusters, such as M13...
II Program. The catalogue contains 400 objects. All objects are from the NGC. All objects are visible in mid northern latitudes, since they were all observed...
in the Barred Bulgeless Galaxy NGC 3319". The Astrophysical Journal. 869 (1): 49. arXiv:1810.10283. Bibcode:2018ApJ...869...49J. doi:10.3847/1538-4357/aaeb90...
V520 Persei is a blue supergiant member of NGC869, one of the Perseus Double Cluster open clusters. It is an irregular variable star. At a magnitude...
the constellation Perseus. It is centered around the double cluster (NGC869 and NGC 884), and has lent its name to the Perseus Arm of the Milky Way. The...
NGC 3664 is a magellanic barred spiral galaxy in the constellation of Leo. It is located about 80 million light years away from Earth, which means, given...
Binoculars 69 NGC 752 Open cluster And Telescope - Binoculars 70 Little Dumbbell Nebula Planetary Nebula Per Telescope 71 NGC869 and NGC 884 Open clusters...
NGC 884, the eastern cluster of the Double Cluster – Wagman, Morton (2003), Lost Stars, McDonald & Woodward, ISBN 0939923785 Bayer's h Persei is NGC 869...
NGC 3344 is a relatively isolated barred spiral galaxy located 22.5 million light years away in the constellation Leo Minor. This galaxy belongs to the...
NGC 7720 is an elliptical galaxy located in the constellation Pegasus. It is located at a distance of about 380 million light years from Earth, which...
Embedded within Messier 24. Associated with Messier 17. Associated with NGC 6820. Embedded within the Iris Nebula. There are some errors in Collinder's...
Astronomical Society. 430: 869–887. doi:10.1093/mnras/sts609. ISSN 0035-8711. Wikimedia Commons has media related to NGC 4332. NGC 4332 on WikiSky: DSS2,...
Outer Shells of the Planetary Nebulae IC 2553 and NGC 5882". The Astrophysical Journal. 542 (2): 861–869. arXiv:astro-ph/0003238. Bibcode:2000ApJ...542....
NGC 4393 is a spiral galaxy about 46 million light-years away in the constellation Coma Berenices. It was discovered by astronomer William Herschel on...
supernovae have been observed in the galaxy, and NGC 5962 has two satellite galaxies. Slightly fainter is NGC 5921, a barred spiral galaxy with a LINER-type...
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