Xi Puppis
 Location of ξ Puppis (circled) |
|
| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Puppis |
| Right ascension | 07h 49m 17.65567s |
| Declination | −24° 51′ 35.2305″ |
| Apparent magnitude (V) | 3.35 |
| Characteristics | |
| Spectral type | G6 Iab-Ib |
| U−B color index | +1.18 |
| B−V color index | +1.25 |
| Astrometry | |
| Radial velocity (Rv) | +2.7 km/s |
| Proper motion (μ) |
RA: −4.81 mas/yr Dec.: −0.89 mas/yr |
| Parallax (π) | 2.72 ± 0.21mas |
| Distance | 1,200 ± 90 ly (370 ± 30 pc) |
| Absolute magnitude (MV) | –4.73 |
| Details | |
| Mass | 9.9 ± 1.0 M☉ |
| Luminosity | 60,000 L☉ |
| Surface gravity (log g) | 1.21 ± 0.09 cgs |
| Temperature | 4,880 ± 150 K |
| Metallicity [Fe/H] | +0.24 dex |
| Rotational velocity (v sin i) | 9.2 km/s |
| Age | 23 Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Xi Puppis (Xi Pup, ξ Puppis, ξ Pup) is a star in the southern constellation of Puppis. With an apparent visual magnitude of 3.35, it is one of the brighter members of this constellation. It is a yellow supergiant. It is sometimes known as Asmidiske (Azmidiske), a misplacement and mistransliteration of Aspidiske, the traditional name of ι Carinae; hence the name Asmidiske for Xi Puppis is not currently IAU-approved.
Based on parallax measurements made during the Hipparcos mission, it is located approximately 1,200 light-years (370 parsecs) away, with a 7.5% margin of error. Because of the distance of this star from the Earth, its visual magnitude is reduced by 0.73 as a result of extinction from the intervening gas and dust.
Asmidiske has a 13th-magnitude companion at an apparent distance of 5".1. It might also be a spectroscopic binary.
...
Wikipedia