11 Puppis
Star in the constellation Puppis
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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]
 | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Puppis |
| Right ascension | 07h 56m 51.53900s[1] |
| Declination | â22° 52â² 48.4340â³[1] |
| Apparent magnitude (V) | 4.20[2] |
| Characteristics | |
| Spectral type | F7/8 II[2] |
| UâB color index | +0.44[3] |
| BâV color index | +0.72[3] |
| Astrometry | |
| Radial velocity (Rv) | +13.30[4] km/s |
| Proper motion (μ) | RA: â30.42[1] mas/yr Dec.: +11.49[1] mas/yr |
| Parallax (Ï) | 6.25±0.23 mas[1] |
| Distance | 520 ± 20 ly (160 ± 6 pc) |
| Absolute magnitude (MV) | â1.82[2] |
| Details | |
| Mass | 2.7[5] Mâ |
| Luminosity | 515[2] Lâ |
| 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 | |
| j Pup, 11 Pup, BDâ22°2087, CDâ22°5403, FK5 2615, GC 10756, HD 65228, HIP 38835, HR 3102, SAO 174852, GSC 06553-03890[8] | |
| Database references | |
| SIMBAD | data |
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]