HD 70642

HD 70642
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Puppis
Right ascension 08h 21m 28.13685s[1]
Declination −39° 42′ 19.4843″[1]
Apparent magnitude (V) +7.17[2]
Characteristics
Spectral type G6V CN+0.5[3]
B−V color index 0.692±0.022[2]
Astrometry
Radial velocity (Rv)+49.31±0.12[1] km/s
Proper motion (μ) RA: −201.729 mas/yr[1]
Dec.: 225.102 mas/yr[1]
Parallax (π)34.1478 ± 0.0154 mas[1]
Distance95.51 ± 0.04 ly
(29.28 ± 0.01 pc)
Absolute magnitude (MV)+4.93[2]
Details
Mass1.04±0.02[4] M☉
Radius0.97±0.01[4] R☉
Luminosity0.917±0.004[4] L☉
Surface gravity (log g)4.47±0.02[4] cgs
Temperature5732±23[4] K
Metallicity [Fe/H]+0.17±0.04[5] dex
Rotational velocity (v sin i)1.57[6] km/s
Age1.9±1.1 Gyr[4]
3.8±2.6[6] Gyr
Other designations
CD−39°4247, GJ 304, HD 70642, HIP 40952, SAO 199126, LTT 3116[7]
Database references
SIMBADdata
Exoplanet Archivedata
ARICNSdata

HD 70642 is a star with an exoplanetary companion in the southern constellation of Puppis. It has an apparent visual magnitude of +7.17,[2] which is too dim to be readily visible to the naked eye. The system is located at a distance of 95.5 light-years (29.3 parsecs) from the Sun based on parallax measurements, and is drifting further away with a radial velocity of +49.3 km/s.[1] It came to within 55.3 ly of the Solar System some 329,000 years ago.[2]

This may be considered to be a solar analog star, being similar in physical properties to the Sun.[5] It is a G-type main-sequence star with a stellar classification of G6V CN+0.5.[3] It is comparable to the age of the Sun, estimated to be in the range of 2–6 billion years old. Although chromospherically inactive a magnetic field has been detected.[5] This star has about the same mass and radius as the Sun, is slightly cooler and less luminous,[4] and is richer in abundance of iron relative to hydrogen.[5] It is spinning at a leisurely rate, showing a projected rotational velocity of 1.6 km/s.[6]

  1. ^ a b c d e f Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  2. ^ a b c d e Cite error: The named reference Anderson_Francis_2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Gray_et_al_2006 was invoked but never defined (see the help page).
  4. ^ a b c d e f g Cite error: The named reference Bonfanti2015 was invoked but never defined (see the help page).
  5. ^ a b c d Cite error: The named reference Fossati_et_al_2013 was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference Costa_Silva_et_al_2020 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Simbad was invoked but never defined (see the help page).