Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Puppis |
Right ascension | 07h 56m 51.53900s[1] |
Declination | −22° 52′ 48.4340″[1] |
Apparent magnitude (V) | 4.20[2] |
Characteristics | |
Spectral type | F7/8 II[2] |
U−B color index | +0.44[3] |
B−V color index | +0.72[3] |
Astrometry | |
Radial velocity (Rv) | +13.30[4] km/s |
Proper motion (μ) | RA: −30.42[1] mas/yr Dec.: +11.49[1] mas/yr |
Parallax (π) | 6.25 ± 0.23 mas[1] |
Distance | 520 ± 20 ly (160 ± 6 pc) |
Absolute magnitude (MV) | −1.82[2] |
Details | |
Mass | 2.7[5] M☉ |
Luminosity | 515[2] L☉ |
Surface gravity (log g) | 1.99[6] cgs |
Temperature | 5,868[6] K |
Metallicity [Fe/H] | +0.09[6] dex |
Rotational velocity (v sin i) | 13.8[7] km/s |
Other designations | |
Database references | |
SIMBAD | data |
11 Puppis is a single[9] star in the southern constellation of Puppis, located approximately 522 light years away based on parallax.[1] It has the Bayer designation j Puppis; 11 Puppis is the Flamsteed designation. This object is visible to the naked eye as a faint, yellow-white star with an apparent visual magnitude of 4.20.[2] It is moving further from the Earth with a heliocentric radial velocity of +13.3 km/s.[4]
This is an evolved bright giant star with a stellar classification of F7/8 II.[2] The spectrum displays a deficit of carbon, an excesses of nitrogen, and a high abundance of lithium.[5] The first two anomalies suggest the giant has passed through a deep convection stage that would have also exhausted the lithium supply, indicating the current lithium abundance is of recent production. The star has 2.7[5] times the mass of the Sun and is radiating 515[2] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 5,868 K.[6]