HD 91312
| Observation data Epoch J2000 Equinox J2000 | ||
|---|---|---|
| Constellation | Ursa Major | |
| Right ascension | 10h 33m 13.88880s[1] | |
| Declination | 40° 25′ 32.0172″[1] | |
| Apparent magnitude (V) | 4.72[2] (4.750 + 11.60)[3] | |
| Characteristics | ||
| Spectral type | A7IV-V[4] + M[5] | |
| B−V color index | 0.222±0.013[2] | |
| Absolute magnitude (MV) | 2.02[2] | |
Semi-amplitude (K1)(primary) | 14.5 km/s | |
| Details | ||
| A | ||
Myr | ||
| B | ||
| Mass | 0.337+0.042 −0.044[5] M☉ | |
| Database references | ||
| SIMBAD | data | |
HD 91312 is a multiple
apparent visual magnitude of 4.72.[2] The system is located at a distance of 109 light-years from the Sun based on parallax. The radial velocity is poorly constrained, but it appears to be drifting further away at a rate of ~9 km/s.[2]
This was identified as a
circumstellar disk of dusty debris.[10] It has a mean temperature of 35 K and is orbiting 218.1 AU from the inner pair.[11]
This star is relatively bright, but it was rarely included in old catalogues. Catalogues and atlases it was not included in are, for example, those by
Latin letters
from "A" to "h".
References
- ^ .
- ^ S2CID 119257644.
- ^ doi:10.1086/323920.
- doi:10.1086/191349.
- ^ S2CID 237940421.
- Bibcode:1978PDAO...15..121B. See No. 431
- ^ S2CID 67773783
- ^ S2CID 125197321, 93.
- ^ "HD 91312". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-10-14.
- doi:10.1086/131813.
- S2CID 118438871, 15.
