HD 172910
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Sagittarius |
| Right ascension | 18h 44m 19.35901s |
| Declination | −35° 38′ 31.1546″ |
| Apparent magnitude (V) | 4.87 |
| Characteristics | |
| Spectral type | B2.5V |
| U−B color index | -0.72 |
| B−V color index | -0.18 |
| Astrometry | |
| Radial velocity (Rv) | +3.90 km/s |
| Proper motion (μ) | RA: -0.68 mas/yr Dec.: -27.24 mas/yr |
| Parallax (π) | 6.99±0.23 mas |
| Distance | 470 ± 20 ly (143 ± 5 pc) |
| Absolute magnitude (MV) | -0.91 |
| Details | |
| Mass | 7.2 M☉ |
| Luminosity | 602 L☉ |
| Temperature | 15,000 K |
| Metallicity [Fe/H] | +0.01 dex |
| Rotational velocity (v sin i) | 65 km/s |
| Other designations | |
| CD-35°12876, CCDM J18443-3539A, FK5 3490, GC 25613, GSC 07419-03077, HIP 91918, HR 7029, HD 172910, SAO 210509, WDS J18443-3539A | |
| Database references | |
| SIMBAD | data |
HD 172910 is a class B2.5V (blue main-sequence) star in the constellation Sagittarius. Its apparent magnitude is 4.87 and it is approximately 467 light years away based on parallax.
It has one companion, B, with magnitude 12.6 and separation 10.0".
In Chinese astronomy, HD 172910 is called 農丈人 (Pinyin: Nóngzhàngrén, lit. 'Peasant'), because this star is marking itself and stand alone in Peasant asterism, Dipper mansion (see : Chinese constellation).