HD 63399
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| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Puppis |
| Right ascension | 07h 47m 14.59403s[1] |
| Declination | −36° 04′ 24.9619″[1] |
| Apparent magnitude (V) | 6.45±0.01[2] |
| Characteristics | |
| Evolutionary stage | red giant branch[3] |
| Spectral type | K1 III[4] |
| U−B color index | +1.13[5] |
| B−V color index | +1.12[5] |
| Astrometry | |
| Radial velocity (Rv) | 28.5±0.2[6] km/s |
| Proper motion (μ) | RA: −35.000 mas/yr[1] Dec.: +26.931 mas/yr[1] |
| Parallax (π) | 7.3283±0.0162 mas[1] |
| Distance | 445.1 ± 1.0 ly (136.5 ± 0.3 pc) |
| Absolute magnitude (MV) | +0.78[7] |
| Details | |
| Mass | 1.29[8] or 1.7+1.3 −0.8[9] M☉ |
| Radius | 10.79[10] R☉ |
| Luminosity | 54.8±0.3[6] L☉ |
| Surface gravity (log g) | 2.47[8] cgs |
| Temperature | 4,761±77[11] K |
| Metallicity [Fe/H] | −0.06[3] dex |
| Other designations | |
| CD−35°3874, CPD−35°1579, GC 10510, HD 63399, HIP 37996, SAO 198437[12] | |
| Database references | |
| SIMBAD | data |
HD 63399 is an orange hued star located in the southern constellation Puppis, the poop deck. It has an apparent magnitude of 6.45,[2] placing it near the limit for naked eye visibility. Based on parallax measurements from Gaia DR3,[1] the object is estimated to be 445 light years distant. It appears to be receding with a spectroscopic radial velocity of 28.5 km/s.[6] At its current distance, HD 63399 is diminished by 0.29 magnitudes due to interstellar dust.[13]
HD 63399 is a red giant star that is currently on the red giant branch,[3] fusing hydrogen in a shell around its core. It has a stellar classification of K1 III.[4] At present it has a mass ranging from 1.3 to 1.7 times the mass of the Sun,[8][9] depending on the study. HD 63399 has expanded to 10.8 times its girth[10] and now radiates 54.8 times the luminosity of the Sun[6] from its swollen photosphere at an effective temperature of 4,761 K.[11] The star has an iron abundance 13% below solar levels, making it slightly metal deficient.[3]
