MX Puppis
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Puppis |
| Right ascension | 08h 13m 29.51720s |
| Declination | −35° 53′ 58.2662″ |
| Apparent magnitude (V) | 4.60 - 4.92 |
| Characteristics | |
| Spectral type | B1.5 IVe |
| U−B color index | −0.98 |
| B−V color index | −0.11 |
| Variable type | γ Cas |
| Astrometry | |
| Radial velocity (Rv) | +35.00 km/s |
| Proper motion (μ) | RA: −7.30 mas/yr Dec.: +9.75 mas/yr |
| Parallax (π) | 3.51±0.16 mas |
| Distance | 930 ± 40 ly (280 ± 10 pc) |
| Absolute magnitude (MV) | −2.97 |
| Details | |
| Mass | 10.1 M☉ |
| Radius | 6.5 R☉ |
| Luminosity | 28,840 L☉ |
| Surface gravity (log g) | 4.41 cgs |
| Temperature | 32,870 K |
| Rotational velocity (v sin i) | 145 km/s |
| Age | 22.5 Myr |
| Other designations | |
| r Puppis, CD−35°4349, GC 11197, GSC 07133-04588, HIP 40274, HR 3237, HD 68980, SAO 198957 | |
| Database references | |
| SIMBAD | data |
MX Puppis (MX Pup) is a class B1.5IV (blue subgiant) star in the constellation Puppis. Its apparent magnitude varies irregularly between magnitude 4.6 and 4.9 and it is classified as a Gamma Cassiopeiae variable. It is approximately 930 light years away based on parallax.
MX Puppis was first found to be a variable star by Alan William James Cousins in 1959. It was given its variable star designation in 1972.