HR 3407
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Vela |
| Right ascension | 08h 34m 43.59703s |
| Declination | −49° 56′ 39.1359″ |
| Apparent magnitude (V) | 5.01 |
| Characteristics | |
| Evolutionary stage | supergiant |
| Spectral type | K1.5Ib |
| U−B color index | +1.38 |
| B−V color index | +1.33 |
| Variable type | microvariable |
| Astrometry | |
| Radial velocity (Rv) | 4.25±0.17 km/s |
| Proper motion (μ) | RA: −14.236±0.322 mas/yr Dec.: +18.540±0.353 mas/yr |
| Parallax (π) | 3.1501±0.1571 mas |
| Distance | 1,040 ± 50 ly (320 ± 20 pc) |
| Absolute magnitude (MV) | –2.06 |
| Details | |
| Mass | 3.3±1.1 M☉ |
| Radius | 73 R☉ |
| Luminosity | 34.36 - 38.02 L☉ |
| Surface gravity (log g) | 2.0 cgs |
| Temperature | 3,745±170 K |
| Metallicity [Fe/H] | −0.4 dex |
| Rotational velocity (v sin i) | 4.1 km/s |
| Other designations | |
| C Vel, CD−49°3646, FK5 2674, HD 73155, HIP 42088, HR 3407, SAO 220138 | |
| Database references | |
| SIMBAD | data |
HR 3407 is a single star in the southern constellation of Vela. It has the Bayer designation C Velorum; HR 3407 is the designation in the Bright Star Catalogue. It is an orange-hued star that is dimly visible to the naked eye with an apparent visual magnitude of 5.01. The distance to this object is approximately 1,040 light years based on parallax measurements, and it is drifting further away with a radial velocity of 4 km/s.
This object is an aging K-type supergiant star with a stellar classification of K1.5Ib. It has about three times the mass of the Sun and has expanded to around 71 times the Sun's radius. The latter is equivalent to 0.33 AU, or about one third the distance from the Sun to the Earth. It is spinning with a projected rotational velocity of 4.1. The star displays microvariability with a period of 10.99 cycles per day and an amplitude of 0.0036 in magnitude. It is radiating around 1,600 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,324 K.