NV Puppis (NV Pup), also known as υ1 Puppis, is a class B2V[3] (blue main-sequence) star in the constellation Puppis. Its apparent magnitude is 4.67[2] and it is approximately 800 light years away based on parallax.[1]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Puppis |
Right ascension | 07h 18m 18.39335s[1] |
Declination | −36° 44′ 02.2329″[1] |
Apparent magnitude (V) | 4.67[2] |
Characteristics | |
Spectral type | B2V+B3IVne[3] |
U−B color index | −0.79[2] |
B−V color index | −0.10[2] |
Variable type | γ Cas[4] |
Astrometry | |
Radial velocity (Rv) | +18.60[5] km/s |
Proper motion (μ) | RA: -10.25[1] mas/yr Dec.: +5.82[1] mas/yr |
Parallax (π) | 4.06 ± 0.18 mas[1] |
Distance | 800 ± 40 ly (250 ± 10 pc) |
Absolute magnitude (MV) | −2.31[6] |
Details | |
Mass | 10.1[7] M☉ |
Luminosity | 12309[8] L☉ |
Temperature | 22,000[8] K |
Metallicity [Fe/H] | 0.00[9] dex |
Rotational velocity (v sin i) | 254[10] km/s |
Other designations | |
Database references | |
SIMBAD | data |
It is a γ Cas variable, ranging from 4.78 to 4.58 magnitude.[4] It is most likely an optical double with the nearby NW Puppis.[12]
Neither component of this double is given a letter in Lacaille's catalogue or the British Association star catalogue.[13][14] Gould gave them the designations (Latin letter) v1 and v2 Puppis, but these are rarely used.[15] Lacaille applied the Greek letter υ to the star now called υ Carinae.[13] The designation υ1 first appeared in several catalogues at the end of the 19th century.[16]