| |
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Puppis |
| Right ascension | 06h37m 45.67135s[1] |
| Declination | −43° 11′ 45.3602″[1] |
| Apparent magnitude (V) | 3.173[2] |
| Characteristics | |
| Spectral type | B8 III[3] |
| U−B color index | −0.397[2] |
| B−V color index | −0.113[2] |
| Astrometry | |
| Radial velocity (Rv) | +30.9[4] km/s |
| Proper motion (μ) | RA: −0.44[1] mas/yr Dec.: −3.87[1] mas/yr |
| Parallax (π) | 8.78 ± 0.26 mas[1] |
| Distance | 370 ± 10 ly (114 ± 3 pc) |
| Absolute magnitude (MV) | −2.11[5] |
| Details | |
| Radius | 4.2[6] R☉ |
| Luminosity | 767[7] L☉ |
| Luminosity (bolometric) | 1,340[8] L☉ |
| Temperature | 12,120[9] K |
| Rotational velocity (v sin i) | 225[10] km/s |
| Other designations | |
ν Pup, CPD−43° 946, HD 47670, HIP 31685, HR 2451, SAO 218071[11] | |
| Database references | |
| SIMBAD | data |
Nu Puppis (ν Puppis) is a solitary,[12] blue-hued star in the southern constellationofPuppis. It is the fifth-brightest star in Puppis, with an apparent visual magnitude of 3.17.[2] Based upon an annual parallax shift of 8.78 mas as seen from Earth,[1] it is located about 370 light years from the Sun. The system made its closest approach about 3.6 million years ago when it underwent perihelion passage at a distance of roughly 27 light years.[13]
The star has a stellar classification of B8 III,[3] matching a B-type giant. Absorption lines in the spectrum are displaying central quasi-emission peaks, indicating this is a Be shell star with a circumstellar disk of heated gas that is being seen edge-on.[14] ν Puppis is a candidate variable star showing an amplitude of 0.0117 magnitude with a frequency of 0.15292 per day.[15] It is spinning rapidly with a projected rotational velocity of 225 km/s. This rotation is giving the star an oblate shape, with the equator being 31% larger than the poles.[10] It is radiating (after allowance for ultraviolet radiation) 1,340[8] times the Sun's luminosity from its photosphere at an effective temperature of 12,120 K.[9]
{{cite web}}: CS1 maint: postscript (link)
