HD 53143
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Carina |
| Right ascension | 06h 59m 59.65545s |
| Declination | −61° 20′ 10.2546 ″ |
| Apparent magnitude (V) | 6.80 |
| Characteristics | |
| Spectral type | G9 V |
| U−B color index | +0.43 |
| B−V color index | +0.80 |
| Astrometry | |
| Radial velocity (Rv) | +21.3 km/s |
| Proper motion (μ) | RA: -161.59 mas/yr Dec.: +264.67 mas/yr |
| Parallax (π) | 54.57±0.34 mas |
| Distance | 59.8 ± 0.4 ly (18.3 ± 0.1 pc) |
| Absolute magnitude (MV) | 6.30 |
| Details | |
| Radius | 0.85 ± 0.02 R☉ |
| Luminosity | 0.7 L☉ |
| Temperature | 5,224 K |
| Metallicity [Fe/H] | 0.22 dex |
| Rotation | 9.6 ± 0.1 days |
| Rotational velocity (v sin i) | 4.0 ± 1.0 km/s |
| Age | 1.01 ± 0.13 Gyr |
| Other designations | |
| Gl 260, CD-61° 1535, HD 53143, LTT 2715, SAO 249700, HIP 33690. | |
| Database references | |
| SIMBAD | data |
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HD 53143 is a star in the Carina constellation, located about 59.8 light-years (18.3 parsecs) from the Earth. With an apparent visual magnitude of 6.80, this star is a challenge to view with the naked eye even under ideal viewing conditions.
Using the technique of gyrochronology, which measures the age of a low-mass star based on its rotation, HD 53143 is about 1,010 ± 130 million years old. Depending on the source, the stellar classification for this star is G9 V or K1V, placing it near the borderline between G-type and K-type main sequence stars. In either case, it is generating energy through the thermonuclear fusion of hydrogen at its core. This star is smaller than the Sun, with about 85% of the Sun's radius. It is emitting only 70% of the Sun's luminosity. The effective temperature of the star's outer envelope is cooler than the Sun at 5,224 K, giving it a golden-orange hue.