HD 30963
Star in the constellation Eridanus
From Wikipedia, the free encyclopedia
HD 30963 is a star in the constellation of Eridanus. With an apparent magnitude of 7.23,[3] it cannot be seen with the naked eye. Parallax measurements put the star at a distance of around 1,022 light-years (313 parsecs).
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Eridanus[1] |
| Right ascension | 04h 51m 39.2471s[2] |
| Declination | −10° 17′ 25.212″[2] |
| Apparent magnitude (V) | 7.23[3] |
| Characteristics | |
| Evolutionary stage | main sequence[2] |
| Spectral type | B9 HgMn[4] |
| Astrometry | |
| Radial velocity (Rv) | −7.2[5] km/s |
| Proper motion (μ) | RA: −7.435[2] mas/yr Dec.: −3.538[2] mas/yr |
| Parallax (π) | 3.1899±0.0204 mas[2] |
| Distance | 1,022 ± 7 ly (313 ± 2 pc) |
| Absolute magnitude (MV) | +0.43[1] |
| Details | |
| Mass | 3.3[2] M☉ |
| Radius | 3.3[2] R☉ |
| Luminosity | 182[2] L☉ |
| Surface gravity (log g) | 3.664±0.031[5] cgs |
| Temperature | 11,476±150[5] K |
| Metallicity [Fe/H] | −0.19[6] dex |
| Rotational velocity (v sin i) | 24±12[5] km/s |
| Age | 207[2] Myr |
| Other designations | |
| BD−10°1028, HD 30963, HIP 22588, SAO 149937 | |
| Database references | |
| SIMBAD | data |
HD 30963 is a late B-type star.[4] It is a mercury-manganese star,[4] a class of chemically peculiar star that has an overabundance of certain elements like mercury. HD 30963 has 150,000 times as much mercury, 2,500 times as much platinum, 1,000 times as much yttrium, and 150 times as much zirconium compared to the Sun.[4] It has a mass of 3.3 M☉, and its surface temperature is about 11,500 K.
HD 30963 is close to the orbit that the Solar System is traversing in the Milky Way. The Sun will be close to the current location of HD 30963 in about 18.5 million years. Interstellar absorption lines for Na I are present for velocities lower than 10 km/s.[7][clarification needed]