HD 164270
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Sagittarius |
| Right ascension | 18h 01m 43.145s |
| Declination | −32° 42′ 55.16″ |
| Apparent magnitude (V) | 8.74 |
| Characteristics | |
| Evolutionary stage | Wolf–Rayet |
| Spectral type | WC |
| Apparent magnitude (G) | 8.56 |
| Astrometry | |
| Proper motion (μ) | RA: +1.724±0.024 mas/yr Dec.: −0.640±0.016 mas/yr |
| Parallax (π) | 0.3696±0.0243 mas |
| Distance | 8,800 ± 600 ly (2,700 ± 200 pc) |
| Absolute magnitude (MV) | −4.6 |
| Details | |
| Mass | 6 M☉ |
| Radius | 4.1 R☉ |
| Luminosity | 79,000 L☉ |
| Temperature | 48,000 K |
| Other designations | |
| Hen 3-1555, V4072 Sgr, CD−32°13623, HD 164270, HIP 88287, SAO 209609, TIC 265405113, TYC 7395-31-1, IRAS 17584-3243, 2MASS J18014314−3242551, Gaia DR3 4042922573453831936 | |
| Database references | |
| SIMBAD | data |
HD 164270, (also known as WR 103 or V4072 Sagittarii), is a Wolf–Rayet star of the carbon subtype (WC) located in the constellation of Sagittarius. The star exhibits low-amplitude photometric and radial velocity variations with a period of 1.754 days, interpreted as arising from a single-line spectroscopic binary system containing a low-mass companion, possibly a neutron star. It has experienced occasional dramatic fading events of nearly 1 magnitude, though these are not definitively linked to eclipses.