HR 3407
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Vela |
| Right ascension | 08h 34m 43.59703s[1] |
| Declination | –49° 56′ 39.1359″[1] |
| Apparent magnitude (V) | 5.01[2] |
| Characteristics | |
| Evolutionary stage | supergiant |
| Spectral type | K1.5Ib[3] |
| U−B color index | +1.38[2] |
| B−V color index | +1.33[2] |
| Variable type | microvariable[4] |
| Astrometry | |
| Radial velocity (Rv) | 4.25±0.17[1] km/s |
| Proper motion (μ) | RA: −14.236±0.322[1] mas/yr Dec.: 18.540±0.353[1] mas/yr |
| Parallax (π) | 3.1501 ± 0.1571 mas[1] |
| Distance | 1,040 ± 50 ly (320 ± 20 pc) |
| Absolute magnitude (MV) | –2.06[5] |
| Details | |
| Mass | 3.3±1.1[6] M☉ |
| Radius | 73[7] R☉ |
| Luminosity | 34.36 - 38.02[7] L☉ |
| Surface gravity (log g) | 2.0[8] cgs |
| Temperature | 3,745±170[7] K |
| Metallicity [Fe/H] | −0.4[8] dex |
| Rotational velocity (v sin i) | 4.1[8] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
HR 3407 is a single[10] star in the southern constellation of Vela. It has the Bayer designation C Velorum; HR 3407 is the designation in the Bright Star Catalogue.[9] It is an orange-hued star that is dimly visible to the naked eye with an apparent visual magnitude of 5.01.[2] 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.[1]
This object is an aging K-type supergiant star with a stellar classification of K1.5Ib.[3] It has about three[6] times the mass of the Sun and has expanded to around 71[1] 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.[8] The star displays microvariability with a period of 10.99 cycles per day and an amplitude of 0.0036 in magnitude.[4] It is radiating around 1,600 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,324 K.[1]
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