HD 171301
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Lyra |
| Right ascension | 18h 32m 49.9579s / 18h 32m 50.1s |
| Declination | +30° 33' 15.152" / +30° 33' 6" |
| Apparent magnitude (V) | 5.465 / 12.7 |
| Characteristics | |
| Spectral type | B8IV / ? |
| U−B color index | -0.34 / ? |
| B−V color index | -0.10 / ? |
| Astrometry | |
| Radial velocity (Rv) | -9.5 / ? km/s |
| Proper motion (μ) | RA: 13.40 / ? mas/yr Dec.: 11.61 / ? mas/yr |
| Parallax (π) | 8.92 ± 0.52 mas |
| Distance | 370 ± 20 ly (112 ± 7 pc) |
| Orbit | |
| Companion | BD+30°3223B |
| Semi-major axis (a) | 7.1" |
| Inclination (i) | 157° |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 171301 and BD+30°3223B are two components of a binary star system in the constellation Lyra, approximately 370 light years away from Earth. The brighter of the pair, 5th magnitude HD 171301, is a subgiant star with the spectral type B8IV. It therefore possesses a surface temperature of 11,000 to 25,000 kelvins and is brighter, larger, and at least twice as hot as our Sun.[1] Its companion, BD+30°3223B, is a 13th magnitude star of an unknown spectral type.[2]
References
- ↑ 1.0 1.1 "Simbad Query Result". Simbad. Retrieved October 16, 2007.
- ↑ 2.0 2.1 "Simbad Query Result". Simbad. Retrieved October 16, 2007.
Components
| NAME | Right ascension | Declination | Apparent magnitude (V) | Spectral type | Database references |
|---|---|---|---|---|---|
| BD+30°3223B | 18h 32m 50.1s | +30° 33' 06 | 12.7 | Simbad |
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