HD 76236
Star in the constellation Chamaeleon
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HD 76236, also designated as HR 3543 or rarely 11 G. Chamaeleontis,[12] is a solitary star[14] located in the southern circumpolar constellation Chamaeleon. It is faintly visible to the naked eye as an orange-hued star with an apparent magnitude of 5.77.[3] Based on parallax measurements from the Gaia satellite, the object is estimated to be 612 light years away.[2] Currently, it is receding with a heliocentric radial velocity of 7 km/s.[6] At its current distance, HD 76236's brightness is diminished by 0.39 magnitudes due to interstellar dust.[15] It has an absolute magnitude of −0.13.[1]
 | |
| Observation data Epoch J2000.0 Equinox ICRS | |
|---|---|
| Constellation | Chamaeleon[1] |
| Right ascension | 08h 45m 55.14862s[2] |
| Declination | −79° 30′ 15.7456″[2] |
| Apparent magnitude (V) | 5.77±0.01[3] |
| Characteristics | |
| Spectral type | K5 III[4] |
| U−B color index | +1.96[5] |
| B−V color index | +1.60[5] |
| Astrometry | |
| Radial velocity (Rv) | 7±0.4[6] km/s |
| Proper motion (μ) | RA: −27.042[2] mas/yr Dec.: +81.026[2] mas/yr |
| Parallax (π) | 5.3327±0.049 mas[2] |
| Distance | 612 ± 6 ly (188 ± 2 pc) |
| Absolute magnitude (MV) | −0.13[1] |
| Details | |
| Mass | 1.78±0.09[7] M☉ |
| Radius | 53.1±2.7[8] R☉ |
| Luminosity | 950+160 −60[2] L☉ |
| Surface gravity (log g) | 1.18[9] cgs |
| Temperature | 3,989±122[10] K |
| Metallicity [Fe/H] | +0.27[9] dex |
| Rotational velocity (v sin i) | 3±1.1[11] km/s |
| Other designations | |
| 11 G. Chamaeleontis[12], CPD−79°352, GC 12194, HD 76236, HIP 43012, HR 3543, SAO 256552[13] | |
| Database references | |
| SIMBAD | data |
This is an evolved red giant with a stellar classification K5 III.[4] It has 1.78 times the mass of the Sun[7] and an enlarged radius of 53.1 R☉.[8] It radiates 950 times the luminosity of the Sun[2] from its photosphere at an effective temperature of 3,989 K.[10] HD 76236 has an iron abundance nearly twice of the Sun's,[9] making it metal enriched. It spins modestly with a projected rotational velocity of 3 km/s. An infrared excess has been detected around HD 76236, indicating that the star may have a circumstellar disk.[16][17]