HD 21749

HD 21749

HD 21749 – star in the constellation Reticulum
Observation data
Epoch J2000      Equinox J2000
Constellation Reticulum
Right ascension 03h 26m 59.22s[1]
Declination −63° 29′ 56.9″[1]
Apparent magnitude (V) 8.143[2]
Characteristics
Spectral type K4.5V[3]
U−B color index 1.144[2]
B−V color index 1.159[2]
Astrometry
Radial velocity (Rv)59.32±0.12[1] km/s
Proper motion (μ) RA: 355.20[1] mas/yr
Dec.: -247.39[1] mas/yr
Parallax (π)61.2271 ± 0.0150 mas[1]
Distance53.27 ± 0.01 ly
(16.333 ± 0.004 pc)
Absolute magnitude (MV)6.95[4]
Details[5]
Mass0.73±0.07 M☉
Radius0.695±0.030 R☉
Luminosity0.20597±0.00016 L☉
Surface gravity (log g)4.613+0.052
−0.061 cgs
Temperature4640±100 K
Metallicity [Fe/H]0.003±0.060 dex
Rotation34.1+2.4
−2.7 d[6]
Rotational velocity (v sin i)1.04 km/s
Age3.8±3.7 Gyr
Other designations
CD−63 110, CPD−63 232A, GJ 143, HIP 16069, SAO 248808, WDS J03270-6330A, TYC 8870-01392-1, 2MASS J03265922-6329569, TOI-186[7]
Database references
SIMBADdata

HD 21749 is an orange main-sequence star in the constellation Reticulum. It has an apparent visual magnitude of 8.143, which means it is too dim to be seen with the naked eye. From parallax measurements by the Gaia spacecraft, it is located 53 ly (16 pc) from Earth.

In 2019, it was discovered that the star has two exoplanets: a possibly rocky, hot sub-Neptune-sized exoplanet named HD 21749 b; and an Earth-sized exoplanet named HD 21749 c. These exoplanets were discovered by the TESS spacecraft.

  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 Cite error: The named reference koen2010 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference Gray2006 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference xhip was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Dragomir2019 was invoked but never defined (see the help page).
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  7. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).