| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Chamaeleon |
| Right ascension | 09h12m 12.3671s[1] |
| Declination | −76° 39′ 46.9007″[1] |
| Apparent magnitude (V) | 6.12±0.01[2] |
| Characteristics | |
| Evolutionary stage | Horizontal branch[3] |
| Spectral type | K1 III[4] |
| U−B color index | +0.99[5] |
| B−V color index | +1.09[5] |
| Astrometry | |
| Radial velocity (Rv) | 0.9±0.4[6] km/s |
| Proper motion (μ) | RA: +39.844 mas/yr[1] Dec.: −43.834 mas/yr[1] |
| Parallax (π) | 9.2743 ± 0.02 mas[1] |
| Distance | 351.7 ± 0.8 ly (107.8 ± 0.2 pc) |
| Absolute magnitude (MV) | +0.75[7] |
| Details | |
| Mass | 1.15[8] M☉ |
| Radius | 9.82[9] R☉ |
| Luminosity | 47±2[10] L☉ |
| Surface gravity (log g) | 2.43[8] cgs |
| Temperature | 4,798±122[11] K |
| Metallicity [Fe/H] | −0.09[12] dex |
| Rotational velocity (v sin i) | <1[13] km/s |
| Other designations | |
12 G. Chamaeleontis, CD−76°416, CPD−76°574, FK5 2735, GC 12766, HD 80194, HIP 45166, HR 3695, SAO 256594[14][15] | |
| Database references | |
| SIMBAD | data |
HD 80194 (HR 3695) is a solitary star in the southern circumpolar constellation Chamaeleon. It has an apparent magnitude of 6.12,[2] allowing it to be faintly seen with the naked eye. Parallax measurements place the object at a distance of 351 light years[1] and is currently receding with a poorly constrained radial velocityof0.9 km/s.[6]
HD 80194 has a stellar classification of K1 III,[4] indicating that it is a red giant that has exhausted its core hydrogen. It is thought to be a red clump star, on the cool end of the horizontal branch and fusing helium in its core.[3] It has 115% the mass of the Sun[8] but has expanded to 9.82 times its girth.[9] It shines at 47 times the luminosity of the Sun[10] from its photosphere at an effective temperatureof4,798 K,[11] giving it an orange glow. HD 80194 has an iron abundance 81% that of the Sun[12] and spins slowly with a projected rotational velocity lower than 1 km/s.[13]
