NGC 5822

Last updated
NGC 5822
NGC 5822.png
NGC 5822 (taken from Stellarium)
Observation data (J2000 epoch)
Right ascension 15h 4m 21.(2)s [1]
Declination −54° 23′ 5(8)″ [1]
Distance 2,682  ly (822.3  pc) [1]
Apparent magnitude  (V)6.5 [2]
Physical characteristics
Mass~1.7×103 [3]   M☉
Radius26.1 ± 1.3 ly (8.0 ± 0.4 pc) [4]
Estimated age900±100 Myr [5]
Other designations NGC 5822, Cr 289, ESO 176-SC 009 [6]
Associations
Constellation Lupus
See also: Open cluster, List of open clusters

NGC 5822 is an open cluster of stars in the southern constellation of Lupus. [7] It was discovered by English Astronomer John Herschel on July 3, 1836, [2] and lies close to another cluster, NGC 5823, which suggests there may be a physical association. [8] [9]

Contents

NGC 5822 is an intermediate age cluster, estimated at around 900 million years old, and it is located nearby [3] at a distance of 2,700  light years. [1] The Trumpler class of this cluster is III 2m. [9] It is richly populated [5] with half the cluster members lying within an angular radius of 22.1′ . [1] The cluster is considered low mass at ~1,700 times the mass of the Sun. [3] It has a core radius of 1.1±0.1 pc and a limiting radius of 8.0±0.4 pc. [4]

Measuring the abundances of a set of F-type stars that are probable members demonstrates the cluster metallicity is very similar to the Sun. [5] It displays an extended main sequence turnoff on the Hertzsprung–Russell diagram, most likely due to differences in stellar rotation. [3] Two barium stars have been identified in NGC 5822, making it only the second cluster shown to host these objects as of 2013. [10]

Related Research Articles

<span class="mw-page-title-main">Wild Duck Cluster</span> Open cluster in the constellation Scutum

The Wild Duck Cluster is an open cluster of stars in the constellation Scutum. It was discovered by Gottfried Kirch in 1681. Charles Messier included it in his catalogue of diffuse objects in 1764. Its popular name derives from the brighter stars forming a triangle which could resemble a flying flock of ducks. The cluster is located just to the east of the Scutum Star Cloud midpoint.

<span class="mw-page-title-main">Messier 35</span> Open cluster in the constellation Gemini

Messier 35 or M35, also known as NGC 2168, is a relatively close open cluster of stars in the west of Gemini, at about the declination of the sun when the latter is at June solstice. It was discovered by Philippe Loys de Chéseaux around 1745 and independently discovered by John Bevis before 1750. It is scattered over part of the sky almost the size of the full moon and is 2,970 light-years away. The compact open cluster NGC 2158 lies directly southwest of it.

<span class="mw-page-title-main">Messier 36</span> Open cluster in the constellation Auriga

Messier 36 or M36, also known as NGC 1960, is an open cluster of stars in the somewhat northern Auriga constellation. It was discovered by Giovanni Batista Hodierna before 1654, who described it as a nebulous patch. The cluster was independently re-discovered by Guillaume Le Gentil in 1749, then Charles Messier observed it in 1764 and added it to his catalogue. It is about 1,330 pc away from Earth. The cluster is very similar to the Pleiades cluster (M45), and if as far away it would be of similar apparent magnitude.

<span class="mw-page-title-main">Messier 50</span> Open cluster in the constellation Monoceros

Messier 50 or M 50, also known as NGC 2323, is an open cluster of stars in the constellation Monoceros. It was recorded by G. D. Cassini before 1711 and independently discovered by Charles Messier in 1772 while observing Biela's Comet. It is sometimes described as a 'heart-shaped' figure or a blunt arrowhead.

<span class="mw-page-title-main">Messier 69</span> Globular cluster in the constellation Sagittarius

Messier 69 or M69, also known NGC 6637, is a globular cluster in the southern constellation of Sagittarius. It can be found 2.5° to the northeast of the star Epsilon Sagittarii and is dimly visible in 50 mm aperture binoculars. The cluster was discovered by Charles Messier on August 31, 1780, the same night he discovered M70. At the time, he was searching for an object described by Nicolas-Louis de Lacaille in 1751–2 and thought he had rediscovered it, but it is unclear if Lacaille actually described M69.

35 Cancri is a star in the zodiac constellation of Cancer, located 630 light years from the Sun. It is a challenge to view with the naked eye even under good seeing conditions, having an apparent visual magnitude of +6.55. The star is moving further from the Earth with a heliocentric radial velocity of +35 km/s, and is a member of the Beehive Cluster.

<span class="mw-page-title-main">Phi Cassiopeiae</span> Star in the constellation Cassiopeia

Phi Cassiopeiae is a star in the constellation Cassiopeia. φ Cassiopeiae is a multiple star with a combined apparent magnitude of +4.95. The two brightest components are A and C, sometimes called φ1 and φ2 Cas. φ Cas A is an F0 bright supergiant of magnitude 4.95 and φ Cas C is a 7.08 magnitude B6 supergiant at 134".

<span class="mw-page-title-main">NGC 346</span> Open cluster in the constellation Tucana

NGC 346 is a young open cluster of stars with associated nebula located in the Small Magellanic Cloud (SMC) that appears in the southern constellation of Tucana. It was discovered August 1, 1826 by Scottish astronomer James Dunlop. J. L. E. Dreyer described it as, "bright, large, very irregular figure, much brighter middle similar to double star, mottled but not resolved". On the outskirts of the cluster is the multiple star system HD 5980, one of the brightest stars in the SMC.

<span class="mw-page-title-main">NGC 3293</span> Open cluster in the constellation Carina

NGC 3293 is an open cluster in the Carina constellation. It was discovered by Nicolas-Louis de Lacaille in 1751. It consists of more than 100 stars brighter than 14th magnitude in a 10 arc minute field, the brightest of which are blue supergiants of apparent magnitude 6.5 and 6.7. There is also a 7th magnitude pulsating red supergiant, V361 Carinae.

<span class="mw-page-title-main">S Normae</span> Star in the constellation Norma

S Normae is a yellow supergiant variable star in the constellation Norma. It is the brightest member of the open cluster NGC 6087.

<span class="mw-page-title-main">V518 Carinae</span> Blue-hued variable star in the constellation Carina

V518 Carinae is a naked-eye variable star in the constellation Carina. It is a member of the bright open cluster IC 2602 near the Carina Nebula.

<span class="mw-page-title-main">NGC 5316</span> Open cluster in the constellation Centaurus

NGC 5316 is an open cluster in the constellation Centaurus. It was discovered by James Dunlop in 1826. Located approximately 4,000 light years away from Earth, it is located in the Carina-Sagittarius arm.

<span class="mw-page-title-main">NGC 4103</span> Open cluster in the constellation Crux

NGC 4103 is an open cluster in the constellation Crux. It was discovered by James Dunlop in 1826. It is located approximately 5,000 light years away from Earth, in the Carina-Sagittarius arm.

<span class="mw-page-title-main">NGC 4815</span> Open cluster in the constellation Musca

NGC 4815 is an open cluster in the constellation Musca. It was discovered by John Herschel in 1834. It is located approximately 10,000 light years away from Earth.

<span class="mw-page-title-main">NGC 3311</span> Galaxy in the constellation Hydra

NGC 3311 is a super-giant elliptical galaxy located about 190 million light-years away in the constellation Hydra. The galaxy was discovered by astronomer John Herschel on March 30, 1835. NGC 3311 is the brightest member of the Hydra Cluster and forms a pair with NGC 3309 which along with NGC 3311, dominate the central region of the Hydra Cluster.

<span class="mw-page-title-main">NGC 4324</span> Galaxy in the constellation of Virgo

NGC 4324 is a lenticular galaxy located about 85 million light-years away in the constellation Virgo. It was discovered by astronomer Heinrich d'Arrest on March 4, 1862. NGC 4324 has a stellar mass of 5.62 × 1010M☉, and a baryonic mass of 5.88 × 1010M☉. The galaxy's total mass is around 5.25 × 1011M☉. NGC 4324 is notable for having a ring of star formation surrounding its nucleus. It was considered a member of the Virgo II Groups until 1999, when its distance was recalculated and it was placed in the Virgo W Group.

HD 33875 is a solitary star in the southern circumpolar constellation Mensa. With an apparent magnitude of 6.26, it is barely visible to the naked eye under ideal conditions. The star is located at a distance of 421 light years but is receding at a rate of 8 km/s.

References

  1. 1 2 3 4 5 Cantat-Gaudin, T.; Anders, F. (January 2020). "Clusters and mirages: cataloguing stellar aggregates in the Milky Way". Astronomy & Astrophysics. 633: 22. arXiv: 1911.07075 . Bibcode:2020A&A...633A..99C. doi:10.1051/0004-6361/201936691. S2CID   208138247. A99.
  2. 1 2 Seligman, Courtney. "NGC Objects: NGC 5800 - 5849". Celestial Atlas. Retrieved 2021-12-29.
  3. 1 2 3 4 Sun, Weijia; et al. (May 2019). "Stellar Rotation and the Extended Main-sequence Turnoff in the Open Cluster NGC 5822". The Astrophysical Journal. 876 (2): 9. arXiv: 1904.03547 . Bibcode:2019ApJ...876..113S. doi: 10.3847/1538-4357/ab16e4 . S2CID   102350601. 113.
  4. 1 2 Bonatto, C.; Bica, E. (July 2005). "Detailed analysis of open clusters: A mass function break and evidence of a fundamental plane". Astronomy and Astrophysics. 437 (2): 483–500. arXiv: astro-ph/0503589 . Bibcode:2005A&A...437..483B. doi:10.1051/0004-6361:20042516. S2CID   18070831.
  5. 1 2 3 Carraro, Giovanni; et al. (October 2011). "A UBVI and uvbyCaHβ Analysis of the Intermediate-age Open Cluster, NGC 5822". The Astronomical Journal. 142 (4): 18. arXiv: 1108.0587 . Bibcode:2011AJ....142..127C. doi:10.1088/0004-6256/142/4/127. S2CID   119099798. 127.
  6. ↑ "NASA/IPAC Extragalactic Database". Results for NGC 5749. Retrieved 2007-04-06.
  7. ↑ "NGC 5822". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2021-12-29.
  8. ↑ Bruck, Mary T.; et al. (1968). "Three-colour photometry of southern galactic clusters IV: NGC 5822, 5823". Publications of the Royal Observatory, Edinburgh. 6 (9): 209–223. Bibcode:1968PROE....6..210B.
  9. 1 2 Dawson, D. W. (November 1978). "DDO photometry of giants in four southern open clusters". Astronomical Journal. 83: 1424–1429. Bibcode:1978AJ.....83.1424D. doi:10.1086/112334.
  10. ↑ Katime Santrich, O. J.; et al. (August 2013). "Two Barium Stars in the Open Cluster NGC 5822". The Astronomical Journal. 146 (2): 12. Bibcode:2013AJ....146...39K. doi: 10.1088/0004-6256/146/2/39 . 39.
This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.