NV Puppis
Star in the constellation Puppis
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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☉ |
| Radius | 8.4[8] R☉ |
| Luminosity | 12,300[9] L☉ |
| Surface gravity (log g) | 4.00[8] cgs |
| Temperature | 24,380[10] K |
| Metallicity [Fe/H] | 0.00[11] dex |
| Rotation | 0.466 days[10] |
| Rotational velocity (v sin i) | 254[12] km/s |
| Other designations | |
| Upsilon1 Puppis, Upsilon1 Pup, υ1 Puppis, υ1 Pup, NV Puppis, NV Pup, CD−36°3512, CCDM J07184-3645A, GC 9733, GSC 07115-03016, HIP 35363, HR 2787, HD 57150, SAO 197824, WDS J07183-3644A | |
| 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.[14]
Neither component of this double is given a letter in Lacaille's catalogue or the British Association star catalogue.[15][16] Gould gave them the designations (Latin letter) v1 and v2 Puppis, but these are rarely used.[17] Lacaille applied the Greek letter υ to the star now called υ Carinae.[15] The designation υ1 first appeared in several catalogues at the end of the 19th century.[18]