HD 74272
Star in the constellation Vela
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HD 74272 is a star in the constellation Vela. It has the Bayer designation n Velorum, while HD 74272 is the identifier from the Henry Draper catalogue. This is a white hued star that is faintly visible to the naked eye with an apparent visual magnitude of 4.74.[1] It is located at a distance of approximately 1,800 light years from the Sun based on parallax.[2] The star is drifting further away with a radial velocity of +17 km/s.[1]
 | |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Vela[1] |
| Right ascension | 08h 41m 13.12966s[2] |
| Declination | −47° 19′ 01.6610″[2] |
| Apparent magnitude (V) | 4.74[1] |
| Characteristics | |
| Spectral type | A5 II[3] |
| B−V color index | 0.137±0.029[1] |
| Astrometry | |
| Radial velocity (Rv) | +17.4±2.8[1] km/s |
| Proper motion (μ) | RA: −8.228[2] mas/yr Dec.: +10.051[2] mas/yr |
| Parallax (π) | 1.7639±0.1441 mas[2] |
| Distance | 1,800 ± 200 ly (570 ± 50 pc) |
| Absolute magnitude (MV) | −4.67[1] |
| Details | |
| Mass | 8.8±0.1[4] M☉ |
| Radius | 33.11+1.76 −0.82[2] R☉ |
| Luminosity | 3,287±312[2] L☉ |
| Surface gravity (log g) | 2.04±0.09[5] cgs |
| Temperature | 7,370±74[5] K |
| Metallicity [Fe/H] | −0.46±0.05[5] dex |
| Rotational velocity (v sin i) | 15.1±1.2[5] km/s |
| Age | 29.8±3.4[4] Myr |
| Other designations | |
| n Vel, CD−46°4448, FK5 2570, HD 74272, HIP 42624, HR 3452, SAO 220284[6] | |
| Database references | |
| SIMBAD | data |
This is an aging, massive bright giant star with a stellar classification of A5 II.[3] It is an estimated 30 million years old with 8.8 times the mass of the Sun.[4] Having exhausted the supply of hydrogen at its core, it has expanded to around 33[2] times the radius of the Sun. The star is radiating 3,287[2] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 7,370 K.[5]