HD 176871

HD 176871
Observation data; Epoch J2000.0 Equinox J2000.0
Constellation	Lyra
Right ascension	19h 01m 17.35683s
Declination	+26° 17′ 29.0764″
Apparent magnitude (V)	5.69
Characteristics
Spectral type	B5V
U−B color index	−0.55
B−V color index	−0.086±0.002
Astrometry
Radial velocity (Rv)	−20.4±1.2 km/s
Proper motion (μ)	RA: −0.489 mas/yr ; Dec.: −9.207 mas/yr
Parallax (π)	4.1038±0.0835 mas
Distance	790 ± 20 ly ; (244 ± 5 pc)
Absolute magnitude (MV)	−0.80
Details
Mass	4.1 M☉
Radius	5.2 R☉
Luminosity	394 L☉
Surface gravity (log g)	4.5 cgs
Temperature	11,688 K
Rotational velocity (v sin i)	268±34 km/s
Age	11 Myr
Other designations
	BD+26°3429, FK5 3518, GC 26151, HD 176871, HIP 93393, HR 7202, SAO 86707
Database references
SIMBAD	data

HD 176871 is a single^[9] star in the northern constellation of Lyra, positioned near the southern constellation border with Vulpecula. This object has a blue-white hue and is dimly visible to the naked eye with an apparent visual magnitude of 5.69.^[1] It is located at a distance of approximately 790 light years from the Sun based on parallax, and has an absolute magnitude of −0.80.^[1] The star is drifting closer with a radial velocity of −20 km/s.^[1]

This is a normal B-type main-sequence star with a stellar classification of B5V,^[3] which means it is generating energy via core hydrogen fusion. The star is around 11^[4] million years old with 5.4^[4] times the mass of the Sun and is spinning rapidly with a projected rotational velocity of 268 km/s.^[7] It is radiating 233^[10] times the luminosity of the Sun from its photosphere at an effective temperature of 10,540 K.^[10]

References

^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ 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. XHIP record for this object at VizieR.
^ ^a ^b ^c ^d ^e 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 ^c Hill, P. W.; Lynas-Gray, A. E. (September 1977), "UBV photometry and MK spectral classification of northern early-type stars at intermediate galactic latitudes.", Monthly Notices of the Royal Astronomical Society, 180 (4): 691–702, Bibcode:1977MNRAS.180..691H, doi:10.1093/mnras/180.4.691.
^ ^a ^b ^c ^d ^e Gullikson, Kevin; et al. (2016), "The Close Companion Mass-ratio Distribution of Intermediate-mass Stars", The Astronomical Journal, 152 (2): 40, arXiv:1604.06456, Bibcode:2016AJ....152...40G, doi:10.3847/0004-6256/152/2/40, S2CID 119179065.
^ ^a ^b Quintana, Alexis L.; Wright, Nicholas J.; Martínez García, Juan (2025), "A census of OB stars within 1 KPC and the star formation and core collapse supernova rates of the Milky Way", Monthly Notices of the Royal Astronomical Society, 538 (3): 1367, arXiv:2503.08286, Bibcode:2025MNRAS.538.1367Q, doi:10.1093/mnras/staf083.
^ ^a ^b Stassun, Keivan G.; et al. (2019), "The Revised TESS Input Catalog and Candidate Target List", The Astronomical Journal, 158 (4): 138, arXiv:1905.10694, Bibcode:2019AJ....158..138S, doi:10.3847/1538-3881/ab3467.
^ ^a ^b Maestro, V.; et al. (2013), "Optical interferometry of early-type stars with PAVO@CHARA - I. Fundamental stellar properties", Monthly Notices of the Royal Astronomical Society, 434 (2): 1321, arXiv:1306.5937, Bibcode:2013MNRAS.434.1321M, doi:10.1093/mnras/stt1092.
^ "HD 176871". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-02-10.
^ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.
^ ^a ^b McDonald, I.; et al. (2012), "Fundamental parameters and infrared excesses of Hipparcos stars", Monthly Notices of the Royal Astronomical Society, 427 (1): 343–357, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x, S2CID 118665352.

[Anderson2012-1] ^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ 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. XHIP record for this object at VizieR.

[GaiaDR2-2] 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.

[Hill1977-3] Hill, P. W.; Lynas-Gray, A. E. (September 1977), "UBV photometry and MK spectral classification of northern early-type stars at intermediate galactic latitudes.", Monthly Notices of the Royal Astronomical Society, 180 (4): 691–702, Bibcode:1977MNRAS.180..691H, doi:10.1093/mnras/180.4.691.

[Gullikson2016-4] Gullikson, Kevin; et al. (2016), "The Close Companion Mass-ratio Distribution of Intermediate-mass Stars", The Astronomical Journal, 152 (2): 40, arXiv:1604.06456, Bibcode:2016AJ....152...40G, doi:10.3847/0004-6256/152/2/40, S2CID 119179065.

[quintana2025-5] Quintana, Alexis L.; Wright, Nicholas J.; Martínez García, Juan (2025), "A census of OB stars within 1 KPC and the star formation and core collapse supernova rates of the Milky Way", Monthly Notices of the Royal Astronomical Society, 538 (3): 1367, arXiv:2503.08286, Bibcode:2025MNRAS.538.1367Q, doi:10.1093/mnras/staf083.

[tic-6] Stassun, Keivan G.; et al. (2019), "The Revised TESS Input Catalog and Candidate Target List", The Astronomical Journal, 158 (4): 138, arXiv:1905.10694, Bibcode:2019AJ....158..138S, doi:10.3847/1538-3881/ab3467.

[Maestro2013-7] Maestro, V.; et al. (2013), "Optical interferometry of early-type stars with PAVO@CHARA - I. Fundamental stellar properties", Monthly Notices of the Royal Astronomical Society, 434 (2): 1321, arXiv:1306.5937, Bibcode:2013MNRAS.434.1321M, doi:10.1093/mnras/stt1092.

[SIMBAD-8] "HD 176871". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-02-10.

[Eggleton2008-9] Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.

[McDonald2012-10] McDonald, I.; et al. (2012), "Fundamental parameters and infrared excesses of Hipparcos stars", Monthly Notices of the Royal Astronomical Society, 427 (1): 343–357, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x, S2CID 118665352.

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Observation data Epoch J2000.0 Equinox J2000.0
Constellation	Lyra^[1]
Right ascension	19^h 01^m 17.35683^s^[2]
Declination	+26° 17′ 29.0764″^[2]
Apparent magnitude (V)	5.69^[1]
Characteristics
Spectral type	B5V^[3]^[1]^[4]
U−B color index	−0.55^[3]
B−V color index	−0.086±0.002^[1]
Astrometry

Radial velocity (R_v)	−20.4±1.2^[1] km/s
Proper motion (μ)	RA: −0.489^[2] mas/yr Dec.: −9.207^[2] mas/yr
Parallax (π)	4.1038±0.0835 mas^[2]
Distance	790 ± 20 ly (244 ± 5 pc)
Absolute magnitude (M_V)	−0.80^[1]

Details

Mass	4.1^[5] `M`_☉
Radius	5.2^[6] `R`_☉
Luminosity	394^[5] `L`_☉
Surface gravity (log g)	4.5^[4] cgs
Temperature	11,688^[6] K
Rotational velocity (v sin i)	268±34^[7] km/s
Age	11^[4] Myr

Other designations
BD+26°3429, FK5 3518, GC 26151, HD 176871, HIP 93393, HR 7202, SAO 86707^[8]
Database references
SIMBAD	data

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