HD 176527
Single star in the constellation Lyra
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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]
| 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 |
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]