HD 1237

HD 1237
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Hydrus
Right ascension 00h 16m 12.6791s[1]
Declination −79° 51′ 04.2447″[1]
Apparent magnitude (V) 6.59
Characteristics
HD 1237 A
Spectral type G6 V
B−V color index 0.749
HD 1237 B
Spectral type M4 V[2]
Astrometry
Radial velocity (Rv)−5.2±0.2[3] km/s
Proper motion (μ) RA: 433.908±0.044[1] mas/yr
Dec.: −56.322±0.039[1] mas/yr
Parallax (π)56.9319 ± 0.0235 mas[1]
Distance57.29 ± 0.02 ly
(17.565 ± 0.007 pc)
Absolute magnitude (MV)5.37 ± 0.01[4]
Details
HD 1237 A
Mass1.00 ± 0.10[5] M☉
Radius0.86 ± 0.07[5] R☉
Luminosity0.64[5] L☉
Surface gravity (log g)4.58 ± 0.09[5] cgs
Temperature5,572 ± 40[5] K
Metallicity [Fe/H]0.12 ± 0.04[5] dex
Rotation7.0±0.7 d[3]
Rotational velocity (v sin i)5.3±1.0[3] km/s
Age800[6] Myr
HD 1237 B
Mass0.13[2] M☉
Other designations
2 G. Hydri, CD−80° 9, GJ 3021, HD 1237, HIP 1292, SAO 258219, 2MASS J00161266-7951042
Database references
SIMBADdata

HD 1237 is a binary star system approximately 57 light-years away in the constellation of Hydrus (the Water Snake).

The visible star in the system, A, is considered to be a solar analog due close mass to the sun. HD 1237 differs from the sun in that HD 1237 is much younger, has high metallicity, has much cooler temperature and is in a binary system. As of 2000, it has been confirmed that an extrasolar planet orbits the star. It is of note for being a relatively Sun-like star not very far from the Sun that is home to an extrasolar planet.[7]

  1. ^ a b c d e Cite error: The named reference Gaia DR2 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference Chauvin2007 was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference Alvarado-Gómez2015 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Holmberg2009 was invoked but never defined (see the help page).
  5. ^ a b c d e f Cite error: The named reference apj720_2_1290 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Saffe2005 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Naef2001 was invoked but never defined (see the help page).