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23 Vulpeculae

Location of 23 Vulpeculae (circled)
Observation data Epoch J2000      Equinox J2000
Constellation	Vulpecula
Right ascension	20 15 46.1432
Declination	27° 48′ 51.116″
Apparent magnitude (V)	4.52
Characteristics
Spectral type	K3- III Fe-1
U−B color index	+1.11
B−V color index	+1.26
Astrometry
Radial velocity (Rv)	+1.47 km/s
Proper motion (μ)	RA: −39.938±0.128 mas/yr Dec.: 12.121±0.147 mas/yr
Parallax (π)	9.9642 ± 0.1698 mas
Distance	327 ± 6 ly (100 ± 2 pc)
Absolute magnitude (MV)	−0.58
Orbit
Primary	23 Vul Aa
Companion	23 Vul Ab
Period (P)	25.33 yr
Semi-major axis (a)	0.111″
Eccentricity (e)	0.400
Inclination (i)	71.5°
Longitude of the node (Ω)	97.5°
Periastron epoch (T)	2009.56
Argument of periastron (ω) (secondary)	293.8°
Details
23 Vul A
Mass	2.4 M☉
Radius	31±2 R☉
Luminosity	288 L☉
Surface gravity (log g)	0.89 cgs
Temperature	4,413±125 K
Metallicity	−0.22 dex
Rotational velocity (v sin i)	3.7 km/s
Other designations
23 Vul, BD+27°3666, GC 28152, HD 192806, HIP 99874, HR 7744, SAO 88428, WDS J20158+2749AB
Database references
SIMBAD	data

23 Vulpeculae is a triple star system in the northern constellation of Vulpecula. It is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 4.52 and it is located approximately 327 light years away from the Sun based on parallax. The system is moving further from the Earth with a heliocentric radial velocity of +1.47 km/s.

Component A forms a binary system with an orbital period of 25.33 years, an eccentricity of 0.40, and a semimajor axis of 0.11″. The 4.80 magnitude member of this pair, component Aa is an aging giant star with a stellar classification of K3- III Fe-1, where the suffix indicates an underabundance of iron in the spectrum. This star has 2.4 times the mass of the Sun and is radiating 288 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,413 K. Its companion, component Ab, has magnitude 6.5. The tertiary member, component B, has a separation of 0.26" and a magnitude of 6.94.

References

1. ^ Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
2. ^ Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode:2002yCat.2237....0D.
3. ^ Keenan, Philip C.; McNeil, Raymond C. (1989). "The Perkins Catalog of Revised MK Types for the Cooler Stars". The Astrophysical Journal Supplement Series. 71: 245. Bibcode:1989ApJS...71..245K. doi:10.1086/191373.
4. ^ Famaey, B.; Jorissen, A.; Luri, X.; Mayor, M.; Udry, S.; Dejonghe, H.; Turon, C. (2005). "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data". Astronomy & Astrophysics. 430: 165–186. arXiv:astro-ph/0409579. Bibcode:2005A&A...430..165F. doi:10.1051/0004-6361:20041272. S2CID 17804304.
5. 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. Vizier catalog entry
6. ^ "Sixth Catalog of Orbits of Visual Binary Stars". United States Naval Observatory. Archived from the original on 2017-04-30. Retrieved 2017-06-02 – via Naval Oceanography Portal. Contains data from Hartkopf, W. I.; Mason, B. D.; Worley, C. E. (2001). Fifth Catalog of Orbits of Visual Binary Stars.
7. ^ Malkov, O. Yu.; Tamazian, V. S.; Docobo, J. A.; Chulkov, D. A. (2012). "Dynamical masses of a selected sample of orbital binaries". Astronomy & Astrophysics. 546: A69. Bibcode:2012A&A...546A..69M. doi:10.1051/0004-6361/201219774. Vizier catalog entry
8. ^ Kallinger, T.; Beck, P. G.; Hekker, S.; Huber, D.; Kuschnig, R.; Rockenbauer, M.; Winter, P. M.; Weiss, W. W.; Handler, G.; Moffat, A. F. J.; Pigulski, A.; Popowicz, A.; Wade, G. A.; Zwintz, K. (2019-04-01). "Stellar masses from granulation and oscillations of 23 bright red giants observed by BRITE-Constellation". Astronomy & Astrophysics. 624: A35. arXiv:1902.07531. Bibcode:2019A&A...624A..35K. doi:10.1051/0004-6361/201834514. ISSN 0004-6361.
9. Soubiran, Caroline; Le Campion, Jean-François; Brouillet, Nathalie; Chemin, Laurent (2016). "The PASTEL catalogue: 2016 version". Astronomy & Astrophysics. 591: A118. arXiv:1605.07384. Bibcode:2016A&A...591A.118S. doi:10.1051/0004-6361/201628497. S2CID 119258214.
10. De Medeiros, J. R.; Mayor, M. (1999). "A catalog of rotational and radial velocities for evolved stars". Astronomy and Astrophysics Supplement Series. 139 (3): 433. arXiv:astro-ph/0608248. Bibcode:1999A&AS..139..433D. doi:10.1051/aas:1999401. Vizier catalog entry
11. "23 Vul". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-05-26.
12. ^ Eggleton, P. P.; Tokovinin, A. A. (2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869. arXiv:0806.2878. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x. S2CID 14878976. Vizier catalog entry
13. Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal. 122 (6): 3466. Bibcode:2001AJ....122.3466M. doi:10.1086/323920. Vizier catalog entry

External links

• 23 Vulpeculae on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images

v t e Constellation of Vulpecula
List of stars in Vulpecula Vulpecula in Chinese astronomy
Stars	Bayer α (Anser) Flamsteed 1 2 3 4 5 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 35 3 Cyg Variable R S T U V X Z RS SV VW WW AW BE BO BP BS BW DR ER LT LV MW NQ NR NS PS PU PW PX QQ QR QU QV QY V379 V387 V407 V452 V457 V458 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 186943 187614 188015 189671 190066 190228 190322 201626 Other ASKAP J1935+2148 BD+23 3912 G 185-32 GD 385 GS 2000+25 HIP 100963 PSR B1919+21 PSR B1930+22 PSR B1937+21 PSR B1953+29 PSR B2020+28 PSR J1946+2052 PSR J2007+2722 Wolf 1346 WR 125 XTE J1859+226 SGR 1935+2154
Exoplanets HD 188015 b HD 189733 b
Star clusters Brocchi's Cluster NGC 6885 NGC 6940
Nebulae Dumbbell Nebula Hen 2-437 Sh2-88
Galaxies	NGC 7052 7080 Other 3C 433
Astronomical events AT 2021lwx
Category

• K-type giants
• Triple star systems
• Vulpecula
• Durchmusterung objects
• Flamsteed objects
• Henry Draper Catalogue objects
• Hipparcos objects
• Bright Star Catalogue objects