HD 1237 information

HD 1237
Observation data; Epoch J2000.0 Equinox J2000.0
Constellation	Hydrus
Right ascension	00h 16m 12.6791s
Declination	−79° 51′ 04.2447″
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
Astrometry
Radial velocity (Rv)	−5.2±0.2 km/s
Proper motion (μ)	RA: 433.908±0.044 mas/yr ; Dec.: −56.322±0.039 mas/yr
Parallax (π)	56.9319 ± 0.0235 mas
Distance	57.29 ± 0.02 ly ; (17.565 ± 0.007 pc)
Absolute magnitude (MV)	5.37 ± 0.01
Details
HD 1237 A
Mass	1.00 ± 0.10 M☉
Radius	0.86 ± 0.07 R☉
Luminosity	0.64 L☉
Surface gravity (log g)	4.58 ± 0.09 cgs
Temperature	5,572 ± 40 K
Metallicity [Fe/H]	0.12 ± 0.04 dex
Rotation	7.0±0.7 d
Rotational velocity (v sin i)	5.3±1.0 km/s
Age	800 Myr
HD 1237 B
Mass	0.13 M☉
Other designations
	2 G. Hydri, CD−80° 9, GJ 3021, HD 1237, HIP 1292, SAO 258219, 2MASS J00161266-7951042
Database references
SIMBAD	data

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]

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

[Gaia_DR2-1] Cite error: The named reference Gaia DR2 was invoked but never defined (see the help page).

[Chauvin2007-2] Cite error: The named reference Chauvin2007 was invoked but never defined (see the help page).

[Alvarado-Gómez2015-3] Cite error: The named reference Alvarado-Gómez2015 was invoked but never defined (see the help page).

[Holmberg2009-4] Cite error: The named reference Holmberg2009 was invoked but never defined (see the help page).

[apj720_2_1290-5] ^ ^a ^b ^c ^d ^e ^f Cite error: The named reference apj720_2_1290 was invoked but never defined (see the help page).

[Saffe2005-6] Cite error: The named reference Saffe2005 was invoked but never defined (see the help page).

[Naef2001-7] Cite error: The named reference Naef2001 was invoked but never defined (see the help page).

Observation data Epoch J2000.0 Equinox J2000.0
Constellation	Hydrus
Right ascension	00^h 16^m 12.6791^s^[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 (R_v)	−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]
Distance	57.29 ± 0.02 ly (17.565 ± 0.007 pc)
Absolute magnitude (M_V)	5.37 ± 0.01^[4]

Details
HD 1237 A
Mass	1.00 ± 0.10^[5] `M`_☉
Radius	0.86 ± 0.07^[5] `R`_☉
Luminosity	0.64^[5] `L`_☉
Surface gravity (log g)	4.58 ± 0.09^[5] cgs
Temperature	5,572 ± 40^[5] K
Metallicity [Fe/H]	0.12 ± 0.04^[5] dex
Rotation	7.0±0.7 d^[3]
Rotational velocity (v sin i)	5.3±1.0^[3] km/s
Age	800^[6] Myr
HD 1237 B
Mass	0.13^[2] `M`_☉
Other designations
2 G. Hydri, CD−80° 9, GJ 3021, HD 1237, HIP 1292, SAO 258219, 2MASS J00161266-7951042
Database references
SIMBAD	data

HD 1237 information

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HD 1237

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List of exoplanets discovered in 2021

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