OU Puppis
Star in the constellation Puppis
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OU Puppis (OU Pup) is a chemically peculiar class A0 (white main-sequence) star in the constellation Puppis. Its apparent magnitude is about 4.9 and it is approximately 188 light-years away based on parallax.
  | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Puppis |
| Right ascension | 07h 13m 13.35060s[1] |
| Declination | −45° 10′ 57.8554″[1] |
| Apparent magnitude (V) | 4.87[2] |
| Characteristics | |
| Spectral type | A0pSi[3] |
| U−B color index | −0.07[4] |
| B−V color index | −0.03[4] |
| Variable type | α2 CVn[5] |
| Astrometry | |
| Radial velocity (Rv) | +4.30[6] km/s |
| Proper motion (μ) | RA: −25.166[1] mas/yr Dec.: −87.380[1] mas/yr |
| Parallax (π) | 17.3622±0.0768 mas[1] |
| Distance | 187.9 ± 0.8 ly (57.6 ± 0.3 pc) |
| Absolute magnitude (MV) | 1.11[2] |
| Details[1] | |
| Mass | 2.215 M☉ |
| Radius | 2.232 R☉ |
| Luminosity | 37.05 L☉ |
| Surface gravity (log g) | 4.26[7] cgs |
| Temperature | 9,568 K |
| Metallicity [Fe/H] | −0.67 dex |
| Rotational velocity (v sin i) | 34[7] km/s |
| Age | 382 Myr |
| Other designations | |
| L1 Puppis, OU Pup, CD−44°3223, GC 9591, GSC 08119–01757, HIP 34899, HR 2746, HD 56022, SAO 218546 | |
| Database references | |
| SIMBAD | data |
It is an α2 CVn variable, ranging from 4.93 to 4.86 magnitudes with a period of 0.92 of a day.[5] Its spectrum has unusually strong lines of silicon, chromium, and strontium, making it an Ap star.[9]
Unlike the majority of star pairs, the number attached to the Bayer designation 'L' is generally a subscript: L1. Its better-known companion L2 Puppis is similarly represented.[10]