HD 33875
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| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Mensa |
| Right ascension | 05h 06m 09.2953s[1] |
| Declination | −73° 02′ 15.6159″[1] |
| Apparent magnitude (V) | 6.26 ± 0.01[2] |
| Characteristics | |
| Spectral type | A1 V[3] or A0 V[4] |
| U−B color index | −0.01[5] |
| B−V color index | +0.01[5] |
| Astrometry | |
| Radial velocity (Rv) | 8 ± 7.4[6] km/s |
| Proper motion (μ) | RA: +17.783[1] mas/yr Dec.: +63.090[1] mas/yr |
| Parallax (π) | 7.742±0.0276 mas[1] |
| Distance | 421 ± 2 ly (129.2 ± 0.5 pc) |
| Absolute magnitude (MV) | +0.7 |
| Details | |
| Mass | 2.31 ± 0.41[7] M☉ |
| Radius | 2.84 ± 0.35[7] R☉ |
| Luminosity | 49.2[8] L☉ |
| Surface gravity (log g) | 4[9] cgs |
| Temperature | 9,392[10] K |
| Rotational velocity (v sin i) | 124 ± 6[10] km/s |
| Age | 411[11] Myr |
| Other designations | |
| 20 G. Mensae, CD−73°219, CPD−73°286, FK5 2388, GC 6313, HD 33875, HIP 23737, HR 1700, SAO 256160 | |
| Database references | |
| SIMBAD | data |
HD 33875 (HR 1700) is a solitary star in the southern circumpolar constellation Mensa. With an apparent magnitude of 6.26,[2] it is barely visible to the naked eye under ideal conditions. The star is located at a distance of 421[1] light years but is receding at a rate of 8 km/s.[6]
HD 33875 is an ordinary A-type main-sequence star with a stellar classification of either A1 V[3] or A0 V[4] depending on the source. At present it has 2.38 times the mass of the Sun[7] and 2.84 times the radius of the Sun.[7] It shines at 49.2 times the Sun's luminosity[8] from its photosphere at an effective temperature of 9,392 K,[10] which gives it a white glow. HD 33875 is a fast rotator, spinning rapidly with a projected rotational velocity of 124 km/s.[10]
