HD 121474
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Centaurus |
| Right ascension | 13h 57m 38.88358s |
| Declination | −63° 41′ 12.1139″ |
| Apparent magnitude (V) | 4.701 |
| Characteristics | |
| Evolutionary stage | red giant branch |
| Spectral type | K1.5IIIb: |
| B−V color index | +1.101 |
| Astrometry | |
| Radial velocity (Rv) | +21.86±0.12 km/s |
| Proper motion (μ) | RA: −40.640 mas/yr Dec.: −33.433 mas/yr |
| Parallax (π) | 15.2855±0.0804 mas |
| Distance | 213 ± 1 ly (65.4 ± 0.3 pc) |
| Absolute magnitude (MV) | +0.67 |
| Details | |
| Mass | 2.70±0.04 M☉ |
| Radius | 11.9±0.2 R☉ |
| Luminosity | 65.2±0.6 L☉ |
| Surface gravity (log g) | 2.75 cgs |
| Temperature | 4,753±4 K |
| Metallicity [Fe/H] | −0.01 dex |
| Age | 502 Myr |
| Other designations | |
| CPD−63°3070, FK5 514, HD 121474, HIP 68191, HR 5241, SAO 252531 | |
| Database references | |
| SIMBAD | data |
HD 121474 is a single star in the southern constellation of Centaurus, near the southern constellation border with Circinus. It is an orange-hued star and is faintly visible to the naked eye with an apparent visual magnitude of 4.70. This object is located at a distance of approximately 213 light years based on parallax, and it has an absolute magnitude of 0.67. It is drifting further away from the Sun with a radial velocity of +22 km/s.
This is an aging giant star with a stellar classification of K1.5IIIb:, having exhausted the supply of hydrogen at its core then cooled and expanded off the main sequence. At present it has 12 times the girth of the Sun, with a near-solar metallicity of −0.01. The star is radiating 65 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,753 K.