HD 176527
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Lyra[1] |
| Right ascension | 18h 59m 45.48423s[2] |
| Declination | +26° 13′ 49.4593″[2] |
| Apparent magnitude (V) | 5.26[1] |
| Characteristics | |
| Evolutionary stage | red giant branch[2] |
| Spectral type | K2III[3] |
| B−V color index | 1.228±0.003[1] |
| Astrometry | |
| Radial velocity (Rv) | −22.56±0.13[4] km/s |
| Proper motion (μ) | RA: −85.738[2] mas/yr Dec.: −11.304[2] mas/yr |
| Parallax (π) | 9.3474±0.0542 mas[2] |
| Distance | 349 ± 2 ly (107.0 ± 0.6 pc) |
| Absolute magnitude (MV) | 0.28[1] |
| Details | |
| Mass | 3.3[2] M☉ |
| Radius | 24[2] R☉ |
| Luminosity | 170[2] L☉ |
| Surface gravity (log g) | 2.09[5] cgs |
| Temperature | 4.297[2] K |
| Metallicity [Fe/H] | −0.28[5] dex |
| Age | 292[2] Myr |
| Other designations | |
| BD+26°3418, GC 26101, HD 176527, HIP 93256, HR 7181, SAO 86673[6] | |
| Database references | |
| SIMBAD | data |
HD 176527 is a single[7] star in the northern constellation of Lyra, positioned near the southern constellation border with Vulpecula. It has an orange hue and is dimly visible to the naked eye with an apparent visual magnitude of 5.26.[1] This object is located at a distance of approximately 349 light years from the Sun based on parallax,[2] and it has an absolute magnitude of 0.28.[1] It is drifting closer with a radial velocity of −22.6 km/s.[4]
This is an aging giant star with a stellar classification of K2III,[3] which indicates it has exhausted the supply of hydrogen at its core, then evolved away from the main sequence by cooling and expanding. At present it has 24 times the radius of the Sun.[2] The star is radiating 170 times the luminosity of the Sun[2] from its swollen photosphere at an effective temperature of 4,297 K.[2]
References
[edit]- ^ a b c d e f 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 f g h i j k l m n o Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b Yoss, Kenneth M. (November 1961), "Spectral and Luminosity Classifications and Measurements of the Strength of Cyanogen Absorption for Late-Type Stars from Objective-Prism Spectra", Astrophysical Journal, 134: 809, Bibcode:1961ApJ...134..809Y, doi:10.1086/147209.
- ^ a b 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 Jönsson, H.; et al. (February 2017), "Abundances of disk and bulge giants from high-resolution optical spectra. I. O, Mg, Ca, and Ti in the solar neighborhood and Kepler field samples", Astronomy & Astrophysics, 598: 11, arXiv:1611.05462, Bibcode:2017A&A...598A.100J, doi:10.1051/0004-6361/201629128, S2CID 49573306, A100.
- ^ "HD 176527". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-02-09.
- ^ 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.