11 Puppis

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]

11 Puppis

Location of 11 Puppis (circled)
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
j Pup, 11 Pup, BD−22°2087, CD−22°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]