HD 82741
Star in the constellation Lynx
From Wikipedia, the free encyclopedia
HD 82741 is a single[10] star in the northern constellation of Lynx. It is visible to the naked eye with an apparent visual magnitude of 4.81.[1] The distance to HD 82741 is 223 light years, as determined from its annual parallax shift of 14.6 mas.[2] It is moving further from the Earth with a heliocentric radial velocity of 1 km/s.[1]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Lynx[1] |
| Right ascension | 09h 35m 03.83005s[2] |
| Declination | +39° 37′ 17.3743″[2] |
| Apparent magnitude (V) | 4.81[1] |
| Characteristics | |
| Evolutionary stage | red clump[3] |
| Spectral type | G9.5 IIIb Fe-1[4] |
| B−V color index | 0.980[5] |
| Astrometry | |
| Radial velocity (Rv) | 0.992±0.002[1] km/s |
| Proper motion (μ) | RA: −30.124[2] mas/yr Dec.: +20.155[2] mas/yr |
| Parallax (π) | 14.6281±0.2230 mas[2] |
| Distance | 223 ± 3 ly (68 ± 1 pc) |
| Absolute magnitude (MV) | 0.573[5] |
| Details | |
| Mass | 1.62[6] M☉ |
| Radius | 8.78±0.61[7] R☉ |
| Luminosity | 58.9[6] L☉ |
| Surface gravity (log g) | 2.6[8] cgs |
| Temperature | 4,809±51[6] K |
| Metallicity [Fe/H] | −0.18[5] dex |
| Rotational velocity (v sin i) | 1.0[8] km/s |
| Age | 2.74[6] Gyr |
| Other designations | |
| BD+40°2224, FK5 2762, HD 82741, HIP 47029, HR 3809, SAO 61578[9] | |
| Database references | |
| SIMBAD | data |
At the age of 2.74[6] billion years, this is an evolved giant star with a stellar classification of G9.5 IIIb Fe-1,[4] where the suffix notation indicates an underabundance of iron in its atmosphere. It belongs to a sub-category of giants called the red clump, indicating that it is on the horizontal branch and is generating energy through the fusion of helium at its core.[3] With 1.62 times the mass of the Sun,[6] it has expanded to 9 times the Sun's radius.[7] It is radiating 58.9 times the Sun's luminosity[6] from its enlarged photosphere at an effective temperature of 4,809 K.[6]