Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Apus |
Right ascension | 18h 05m 26.85525s[1] |
Declination | −81° 29′ 11.6368″[1] |
Apparent magnitude (V) | 6.35±0.01[2] |
Characteristics | |
Spectral type | K3/4 III[3] |
U−B color index | +1.75[4] |
B−V color index | +1.50[4] |
Astrometry | |
Radial velocity (Rv) | −3.3±0.4[5] km/s |
Proper motion (μ) | RA: +28.344 mas/yr[1] Dec.: −48.347 mas/yr[1] |
Parallax (π) | 3.2987 ± 0.0286 mas[1] |
Distance | 989 ± 9 ly (303 ± 3 pc) |
Absolute magnitude (MV) | −0.61[6] |
Details | |
Radius | 42.0+4.2 −4.1[7] or 67.8±1.6[1] R☉ |
Luminosity | 495±13[7] or 1,055+28 −27[1] L☉ |
Surface gravity (log g) | 0.71±0.01[8] cgs |
Temperature | 4,186±122[9] K |
Metallicity [Fe/H] | −0.66[8] dex |
Rotational velocity (v sin i) | <1.0[10] km/s |
Other designations | |
Database references | |
SIMBAD | data |
HD 162337, also known as HR 6646 or rarely 65 G. Apodis, is a solitary orange-hued star located in the southern circumpolar constellation Apus. It has an apparent magnitude of 6.35,[2] placing it near the limit for naked eye visibility, even under ideal conditions. The object is located relatively far at a distance of 989 light-years based on Gaia DR3 parallax measurements,[1] but it is drifting closer with a heliocentric radial velocity of −3.3 km/s.[5] At its current distance, HD 162337's brightness is heavily diminished by 0.45 magnitudes due to interstellar extinction[13] and it has an absolute magnitude of −0.61.[6]
HD 162337 has a stellar classification of K3/4 III,[3] indicating that it is an evolved star with the characteristics of a K3 and K4 giant star. It has expanded to 42 times the radius of the Sun[7] and now radiates 495 times the luminosity of the Sun[7] from its enlarged photosphere at an effective temperature of 4,186 K.[9] However, Gaia DR3 stellar evolution models give a larger radius of 67.8±1.6 R☉[1] and a higher luminosity of 1,055+28
−27 L☉.[1] HD 162337 is metal deficient with an iron abundance 21.9% that of the Sun's ([Fe/H] = −0.66)[8] and it spins too slowly for its projected rotational velocity to measured accurately.[10]