HD 61330
Star in the constellation Puppis
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HD 61330 (f Puppis) is a binary star in the constellation Puppis. Its apparent magnitude is 4.53[3] and it is approximately 360 light years away based on parallax.[2]
Right ascension07h 37m 22.10978s[2]
Declination−34° 58′ 06.7109″[2]
Apparentmagnitude(V)4.53[3] + 6.87[4]
 | |
| Observation data Epoch J2000 Equinox ICRS | |
|---|---|
| Constellation | Puppis[1] |
| Right ascension | 07h 37m 22.10978s[2] |
| Declination | −34° 58′ 06.7109″[2] |
| Apparent magnitude (V) | 4.53[3] + 6.87[4] |
| Characteristics | |
| Evolutionary stage | main sequence[5] |
| Spectral type | B8IV[6] |
| U−B color index | −0.31[3] |
| B−V color index | −0.09[3] |
| Astrometry | |
| Radial velocity (Rv) | +24.00[7] km/s |
| Proper motion (μ) | RA: −14.21[2] mas/yr Dec.: +16.32[2] mas/yr |
| Parallax (π) | 9.05±0.40 mas[2] |
| Distance | 360 ± 20 ly (110 ± 5 pc) |
| Absolute magnitude (MV) | −0.68[1] |
| Orbit[8] | |
| Period (P) | 78.38±2.00 yr |
| Semi-major axis (a) | 0.322±0.003″ |
| Eccentricity (e) | 0.655±0.005 |
| Inclination (i) | 152.9±5.0° |
| Longitude of the node (Ω) | 74.7±5.0° |
| Periastron epoch (T) | 2016.754±0.500 |
| Argument of periastron (ω) (secondary) | 208.4±5.0° |
| Details | |
| f Pup A | |
| Mass | 3.32±0.15[8] M☉ |
| Luminosity | 270[5] L☉ |
| Temperature | 11,480[5] K |
| Rotational velocity (v sin i) | 56[5] km/s |
| f Pup C | |
| Mass | 2.11±0.10[8] M☉ |
| Other designations | |
| f Puppis, CD−34°3755, CCDM J07374-3458ABC, FK5 290, GC 10246, GSC 07113-03280, HIP 37096, HR 2937, HD 61330, SAO 198195, WDS J07374-3458AB,C | |
| Database references | |
| SIMBAD | data |
The primary and secondary, with respective labels A and C, take 78 years to complete an orbit, with a considerable eccentricity of 0.655.[8] Another closer component, B, has been reported at 6.1 magnitude and 0.1" separation, but subsequent observers have repeatedly failed to confirm it.[9][10]
