| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Lyra [1] |
| Right ascension | 18h 32m 49.95782s [2] |
| Declination | +30° 33′ 15.14853″ [2] |
| Apparent magnitude (V) | 5.47 [1] + 12.7 [3] |
| Characteristics | |
| Spectral type | B8IV [4] or B8V [5] |
| U−B color index | −0.463 [1] |
| B−V color index | −0.077±0.003 [1] |
| Astrometry | |
| Radial velocity (Rv) | −10.3±1.5 [6] km/s |
| Proper motion (μ) | RA: 13.229 [2] mas/yr Dec.: 11.581 [2] mas/yr |
| Parallax (π) | 9.3894±0.1103 mas [2] |
| Distance | 347 ± 4 ly (107 ± 1 pc) |
| Absolute magnitude (MV) | 0.27 [1] |
| Details | |
| A | |
| Mass | 3.12±0.03 [7] M☉ |
| Radius | 2.7±0.1 [8] R☉ |
| Luminosity | 123.8+7.7 −7.1 [7] L☉ |
| Temperature | 11,695±81 [7] K |
| Metallicity [Fe/H] | +0.08±0.07 [9] dex |
| Rotational velocity (v sin i) | 36±2 [5] km/s |
| Other designations | |
| BD+30°3223, GC 25340, HD 171301, HIP 90923, HR 6968, SAO 67090, CCDM J18328+3033, GSC 02624-02539 [10] | |
| Database references | |
| SIMBAD | data |
HD 171301 is a suspected binary star [11] system in the northern constellation of Lyra. It has not been well-studied. [5] The brighter member of the pair, designated component A, [3] has a blue-white hue and is visible to the naked eye with an apparent visual magnitude of 5.47. [1] The system is located at a distance of approximately 347 light years from the Sun based on parallax, but is drifting closer with a radial velocity of −10 km/s. [6]
The stellar classification of HD 171301 is B8IV, [4] matching a late B-type star that may be a subgiant that is evolving off the main sequence. HD 171301 appears to be a type of chemically peculiar mercury-manganese star. [5] It has an estimated mass three [7] times that of the Sun and 2.7 times the Sun's radius. [8] The star is spinning with a projected rotational velocity of 36 km/s. [5] It is radiating 124 [7] times the luminosity of the Sun from its photosphere at an effective temperature of 11,695 K. [7]
Its companion, component B, is a 13th magnitude star of an unknown spectral type. [12] It was first reported by S. W. Burnham in 1891. As of 1998, it was located at an angular separation of 6.7 arcseconds from the brighter star along a position angle of 157°. [3]