Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Chamaeleon |
Right ascension | 10h 35m 24.7604s [1] |
Declination | −76° 18′ 32.3366″ [1] |
Apparent magnitude (V) | 6.29±0.01 [2] |
Characteristics | |
Spectral type | K2 III [3] |
U−B color index | +1.27 [4] |
B−V color index | +1.20 [4] |
Astrometry | |
Radial velocity (Rv) | 17.8±2.3 [5] km/s |
Proper motion (μ) |
RA: −16.952
mas/
yr
[1] Dec.: +6.489 mas/ yr [1] |
Parallax (π) | 5.4324 ± 0.1144 mas [1] |
Distance | 600 ± 10
ly (184 ± 4 pc) |
Absolute magnitude (MV) | −0.03 |
Details | |
Mass | 1.22 [6] M☉ |
Radius | 14.39 [7] R☉ |
Luminosity | 81.3+9.9 −8.8 [8] L☉ |
Surface gravity (log g) | 1.76 [6] cgs |
Temperature | 4,460±90 [8] K |
Metallicity [Fe/H] | +0.06 [9] dex |
Rotational velocity (v sin i) | <1 [10] km/s |
Other designations | |
Database references | |
SIMBAD | data |
HD 92209 (HR 4170) is a probable spectroscopic binary [10] in the southern circumpolar constellation Chamaeleon. It has an apparent magnitude of 6.29, [2] placing it near the max naked eye visibility. Parallax measurements place the system at a distance of 600 light years [1] and is currently receding with a heliocentric radial velocity of almost 18 km/s. [5]
The visible component has a stellar classification of K2 III, [3] indicating that it is a red giant. As a consequence, it has expanded to 14.39 times the radius of the Sun. [7] Nevertheless, it has 122% the mass of the Sun [6] and shines with a luminosity of 81.3 L☉, [8] yielding an effective temperature of 4,460 K [8] from its enlarged photosphere, which in turn gives an orange hue. HD 92209 has a metallicity 115% that of the Sun [9] and spins leisurely with a projected rotational velocity lower than 1 km/s. [10]
Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Chamaeleon |
Right ascension | 10h 35m 24.7604s [1] |
Declination | −76° 18′ 32.3366″ [1] |
Apparent magnitude (V) | 6.29±0.01 [2] |
Characteristics | |
Spectral type | K2 III [3] |
U−B color index | +1.27 [4] |
B−V color index | +1.20 [4] |
Astrometry | |
Radial velocity (Rv) | 17.8±2.3 [5] km/s |
Proper motion (μ) |
RA: −16.952
mas/
yr
[1] Dec.: +6.489 mas/ yr [1] |
Parallax (π) | 5.4324 ± 0.1144 mas [1] |
Distance | 600 ± 10
ly (184 ± 4 pc) |
Absolute magnitude (MV) | −0.03 |
Details | |
Mass | 1.22 [6] M☉ |
Radius | 14.39 [7] R☉ |
Luminosity | 81.3+9.9 −8.8 [8] L☉ |
Surface gravity (log g) | 1.76 [6] cgs |
Temperature | 4,460±90 [8] K |
Metallicity [Fe/H] | +0.06 [9] dex |
Rotational velocity (v sin i) | <1 [10] km/s |
Other designations | |
Database references | |
SIMBAD | data |
HD 92209 (HR 4170) is a probable spectroscopic binary [10] in the southern circumpolar constellation Chamaeleon. It has an apparent magnitude of 6.29, [2] placing it near the max naked eye visibility. Parallax measurements place the system at a distance of 600 light years [1] and is currently receding with a heliocentric radial velocity of almost 18 km/s. [5]
The visible component has a stellar classification of K2 III, [3] indicating that it is a red giant. As a consequence, it has expanded to 14.39 times the radius of the Sun. [7] Nevertheless, it has 122% the mass of the Sun [6] and shines with a luminosity of 81.3 L☉, [8] yielding an effective temperature of 4,460 K [8] from its enlarged photosphere, which in turn gives an orange hue. HD 92209 has a metallicity 115% that of the Sun [9] and spins leisurely with a projected rotational velocity lower than 1 km/s. [10]