Star in the constellation Vulpecula
19 Vulpeculae Observation data Epoch J2000.0 Equinox J2000.0 |
Constellation | Vulpecula |
Right ascension | 20h 11m 47.9738s[1] |
Declination | 26° 48′ 32.3736″[1] |
Apparent magnitude (V) | 5.40[2] |
Characteristics |
Spectral type | K2 IIIa[3] |
B−V color index | 1.40[4] |
Astrometry |
---|
|
---|
Radial velocity (Rv) | −19.33±0.11[4] km/s |
Proper motion (μ) | RA: 1.619±0.119[1] mas/yr Dec.: −10.600±0.122[1] mas/yr |
Parallax (π) | 1.9328 ± 0.0779 mas[1] |
Distance | 1,690 ± 70 ly (520 ± 20 pc) |
Absolute magnitude (MV) | −2.60[5] |
|
Details |
---|
|
---|
Mass | 4.94±0.53[6] M☉ |
Radius | 100.3+1.7 −3.0[1] R☉ |
Luminosity | 2,889±145[1] L☉ |
Surface gravity (log g) | 1.40[7] cgs |
Temperature | 4,200[7] K |
Metallicity [Fe/H] | −0.01[7] dex |
Rotational velocity (v sin i) | < 3.4[8] km/s |
|
Other designations |
---|
|
Database references |
---|
SIMBAD | data |
19 Vulpeculae is star located approximately 1,690[1] light years from Earth in the northern constellation of Vulpecula.[9] It is a probable member of the open cluster NGC 6882.[4] This object is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 5.40.[2] It is moving closer to the Earth with a heliocentric radial velocity of −19 km/s.[4]
This is an aging giant star with a stellar classification of K2 IIIa,[3] having already consumed the hydrogen at its core and evolved away from the main sequence. It has nearly five[6] times the mass of the Sun but has expanded to around 100[1] times the Sun's radius. The star is radiating 2,889[1] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,200 K.[7]
References
- ^ a b c d e f g h i j Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ a b Fernie, J. D. (1983). "New UBVRI photometry for 900 supergiants". Astrophysical Journal Supplement Series. 52: 7. Bibcode:1983ApJS...52....7F. doi:10.1086/190856.
- ^ a b Keenan, Philip C.; McNeil, Raymond C. (1989). "The Perkins catalog of revised MK types for the cooler stars". Astrophysical Journal Supplement Series. 71: 245. Bibcode:1989ApJS...71..245K. doi:10.1086/191373.
- ^ a b c d Mermilliod, J. C.; et al. (2008). "Red giants in open clusters. XIV. Mean radial velocities for 1309 stars and 166 open clusters". Astronomy & Astrophysics. 485 (1): 303–314. Bibcode:2008A&A...485..303M. CiteSeerX 10.1.1.30.7545. doi:10.1051/0004-6361:200809664.
- ^ Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. S2CID 119257644.
- ^ a b Hohle, M.M.; et al. (2010). "Masses and luminosities of O- and B-type stars and red supergiants". Astronomische Nachrichten. 331 (4): 349. arXiv:1003.2335. Bibcode:2010AN....331..349H. doi:10.1002/asna.200911355. S2CID 111387483.
- ^ a b c d Luck, R. Earle (March 1994). "Open Cluster Chemical Composition. I. Later Type Stars in Eight Clusters". Astrophysical Journal Supplement. 91: 309. Bibcode:1994ApJS...91..309L. doi:10.1086/191940.
- ^ De Medeiros, J. R.; et al. (November 2000). "Rotation and lithium in single giant stars". Astronomy and Astrophysics. 363: 239–243. arXiv:astro-ph/0010273. Bibcode:2000A&A...363..239D.
- ^ a b "19 Vulpeculae". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-11-18.
External links
- 19 Vulpeculae on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
Constellation of Vulpecula
|
Stars | Bayer | |
---|
Flamsteed | |
---|
Variable | |
---|
HR | - 7207
- 7250
- 7263
- 7286
- 7364
- 7384
- 7391
- 7421
- 7452
- 7472
- 7490
- 7540
- 7556
- 7573
- 7601
- 7656
- 7716
- 7760
- 7811
- 7849
- 7862
- 7895
- 7903
- 8082
- 8158
- 8190
- 8194
- 8197
- 8198
|
---|
HD | |
---|
Other | |
---|
|
---|
|
|
|
Galaxies | |
---|
|
![](//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/16px-Symbol_category_class.svg.png) Category |