Astronomy:32 Vulpeculae
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Vulpecula |
| Right ascension | 20h 54m 33.63782s[1] |
| Declination | +28° 03′ 27.4632″[1] |
| Apparent magnitude (V) | 5.03[2] (4.99–5.06)[3] |
| Characteristics | |
| Evolutionary stage | giant[4] |
| Spectral type | K4 III[5] |
| B−V color index | 1.480[4] |
| Variable type | suspected[3] |
| Astrometry | |
| Radial velocity (Rv) | +5.7±0.6[2] km/s |
| Proper motion (μ) | RA: −2.525±0.209[1] mas/yr Dec.: −2.277±0.197[1] mas/yr |
| Parallax (π) | 5.3885 ± 0.1260[1] mas |
| Distance | 610 ± 10 ly (186 ± 4 pc) |
| Absolute magnitude (MV) | −1.76[4] |
| Details | |
| Radius | 54.29+1.69 −3.42[1] R☉ |
| Luminosity | 708.4±19.5[1] L☉ |
| Surface gravity (log g) | 1.74[6] cgs |
| Temperature | 4,041+134 −61[1] K |
| Metallicity [Fe/H] | −0.16[6] dex |
| Rotational velocity (v sin i) | 8.1[4] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
32 Vulpeculae is a single[8] star located around 610[1] light years away from the Sun in the northern constellation Vulpecula,[7] a few degrees south of the border with Cygnus. It is visible to the naked eye as a faint, orange-hued star with a typical apparent visual magnitude of 5.03.[2] This object is drifting further away from the Earth with a heliocentric radial velocity of +6 km/s.[2]
This is an aging red giant[4] star with a stellar classification of K4 III,[5] having exhausted the supply of hydrogen at its core then expanded to 54[1] times the Sun's radius. It is a suspected variable of unknown type, with a visual magnitude that has been measured ranging from 4.99 down to 5.06.[3] The star is radiating 708[1] times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,041 K.[1]
References
- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
- ↑ 2.0 2.1 2.2 2.3 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ 3.0 3.1 3.2 Samus, N. N. et al. (2017), "General Catalogue of Variable Stars", Astronomy Reports, 5.1 61 (1): 80–88, doi:10.1134/S1063772917010085, Bibcode: 2017ARep...61...80S.
- ↑ 4.0 4.1 4.2 4.3 4.4 Ryon, Jenna et al. (August 2009), "Comparing the Ca ii H and K Emission Lines in Red Giant Stars", Publications of the Astronomical Society of the Pacific 121 (882): 842, doi:10.1086/605456, Bibcode: 2009PASP..121..842R.
- ↑ 5.0 5.1 Roman, Nancy G. (July 1952), "The Spectra of the Bright Stars of Types F5-K5", Astrophysical Journal 116: 122, doi:10.1086/145598, Bibcode: 1952ApJ...116..122R.
- ↑ 6.0 6.1 McWilliam, Andrew (December 1990), "High-resolution spectroscopic survey of 671 GK giants. I - Stellar atmosphere parameters and abundances", Astrophysical Journal Supplement Series 74: 1075–1128, doi:10.1086/191527, Bibcode: 1990ApJS...74.1075M.
- ↑ 7.0 7.1 "32 Vul". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=32+Vul.
- ↑ 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, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E.
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