Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Puppis |
Right ascension | 08h 13m 19.96710s[1] |
Declination | −15° 47′ 17.6008″[1] |
Apparent magnitude (V) | 4.99[2] |
Characteristics | |
Spectral type | G4 Ib-II[3] |
U−B color index | +0.78[2] |
B−V color index | +1.07[2] |
Astrometry | |
Radial velocity (Rv) | +16.80[4] km/s |
Proper motion (μ) | RA: −12.718[1] mas/yr Dec.: −4.270[1] mas/yr |
Parallax (π) | 3.2906 ± 0.1404 mas[1] |
Distance | 990 ± 40 ly (300 ± 10 pc) |
Absolute magnitude (MV) | −2.12[5] |
Details | |
Mass | 5.2±0.2[6] M☉ |
Radius | 47.60+1.55 −1.16[1] R☉ |
Luminosity | 1,087.12±53.98[1] L☉ |
Surface gravity (log g) | 0.80[7] cgs |
Temperature | 4,804+59 −77[1] K |
Metallicity [Fe/H] | −0.18[5] dex |
Rotational velocity (v sin i) | 6.9[8] km/s |
Age | 90[6] Myr |
Other designations | |
Database references | |
SIMBAD | data |
20 Puppis is a solitary[10] star in the southern constellation of Puppis. It is visible to the naked eye as a faint, yellow-hued star with an apparent visual magnitude of 4.99.[2] The star lies approximately 990 light years away from the Sun based on parallax. It is receding from the Earth with a heliocentric radial velocity of +16.8 km/s.[4]
This object has a stellar classification of G4 Ib-II,[3] matching a G-type star with a luminosity class part way between a bright giant and a supergiant star. It is just 90[6] million years old with around five[6] times the mass of the Sun. The star has expanded to 48[1] times the Sun's radius and is radiating 1,087[1] times as much luminosity as the Sun from its enlarged photosphere at an effective temperature of 4,804 K.[1]
GaiaDR2
was invoked but never defined (see the help page).Ducati2002
was invoked but never defined (see the help page).Keenan1989
was invoked but never defined (see the help page).Gontcharov2006
was invoked but never defined (see the help page).XHIP
was invoked but never defined (see the help page).leonid09
was invoked but never defined (see the help page).Soubiran2016
was invoked but never defined (see the help page).deMedeiros1999
was invoked but never defined (see the help page).SIMBAD
was invoked but never defined (see the help page).Eggleton2008
was invoked but never defined (see the help page).