HD 53143

HD 53143

Debris disk around the star HD 53143 by the Hubble Space Telescope. The star itself has been hidden by the camera coronograph to make the disk visible.
Observation data
Epoch J2000      Equinox J2000
Constellation Carina[1]
Right ascension 06h 59m 59.65545s[2]
Declination −61° 20′ 10.2546 ″[2]
Apparent magnitude (V) 6.80[3]
Characteristics
Spectral type G9 V[4]
U−B color index +0.43[4]
B−V color index +0.80[4]
Astrometry
Radial velocity (Rv)+21.3[5] km/s
Proper motion (μ) RA: -161.59[2] mas/yr
Dec.: +264.67[2] mas/yr
Parallax (π)54.57 ± 0.34 mas[2]
Distance59.8 ± 0.4 ly
(18.3 ± 0.1 pc)
Absolute magnitude (MV)6.30[6]
Details
Radius0.85 ± 0.02[7] R☉
Luminosity0.7[6] L☉
Temperature5,224[6] K
Metallicity [Fe/H]0.22[8] dex
Rotation9.6 ± 0.1 days[9]
Rotational velocity (v sin i)4.0 ± 1.0[7] km/s
Age1.01 ± 0.13[10] Gyr
Other designations
Gl 260, CD-61° 1535, HD 53143, LTT 2715, SAO 249700, HIP 33690.[11]
Database references
SIMBADdata

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.[10] Depending on the source, the stellar classification for this star is G9 V[4] or K1V,[6] 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.[7] 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.[6]

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