| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Puppis |
| Right ascension | 07h18m 38.18632s[1] |
| Declination | −36° 44′ 33.8557″[1] |
| Apparent magnitude (V) | 5.11[2] |
| Characteristics | |
| Spectral type | B3 Vne |
| Variable type | β Cep[2] |
| Astrometry | |
| Radial velocity (Rv) | +18.00±10[3] km/s |
| Proper motion (μ) | RA: −10.848[1] mas/yr Dec.: +6.699[1] mas/yr |
| Parallax (π) | 3.5875 ± 0.1683 mas[1] |
| Distance | 910 ± 40 ly (280 ± 10 pc) |
| Details | |
| Luminosity | 1,108[4] L☉ |
| Surface gravity (log g) | 4.07±0.57[5] cgs |
| Temperature | 17,930±540[5] K |
| Rotational velocity (v sin i) | 80±8[5] km/s |
| Other designations | |
υ2 Pup, NW Pup, CD−36°3519, HD 57219, HIP 35406, HR 2790, SAO 197837 | |
| Database references | |
| SIMBAD | data |
NW Puppis, also known as υ2 Puppis, is a star in the constellation Puppis. Located around 910 light-years distant, it shines with a luminosity approximately 1,108 times that of the Sun and has a surface temperature of 15,000 K.[4] Anamarija Stankov ruled this star out as a Beta Cephei variable.[6]
Neither component of this double is given a letter in Lacaille's catalogue or the British Association star catalogue.[7][8] Gould gave them the designations (Latin letter) v1 and v2 Puppis, but these are rarely used.[9] Lacaille applied the Greek letter υ to the star now called υ Carinae.[7] The designation υ2 first appeared in several catalogues at the end of the 19th century.[10]
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