OU Puppis
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Puppis |
| Right ascension | 07h 13m 13.35060s |
| Declination | −45° 10′ 57.8554″ |
| Apparent magnitude (V) | 4.87 |
| Characteristics | |
| Spectral type | A0pSi |
| U−B color index | −0.07 |
| B−V color index | −0.03 |
| Variable type | α2 CVn |
| Astrometry | |
| Radial velocity (Rv) | +4.30 km/s |
| Proper motion (μ) | RA: −25.166 mas/yr Dec.: −87.380 mas/yr |
| Parallax (π) | 17.3622±0.0768 mas |
| Distance | 187.9 ± 0.8 ly (57.6 ± 0.3 pc) |
| Absolute magnitude (MV) | 1.11 |
| Details | |
| Mass | 2.215 M☉ |
| Radius | 2.232 R☉ |
| Luminosity | 37.05 L☉ |
| Surface gravity (log g) | 4.26 cgs |
| Temperature | 9,568 K |
| Metallicity [Fe/H] | −0.67 dex |
| Rotational velocity (v sin i) | 34 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 |
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.
It is an α2 CVn variable, ranging from 4.93 to 4.86 magnitudes with a period of 0.92 of a day. Its spectrum has unusually strong lines of silicon, chromium, and strontium, making it an Ap star.
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.