HIP 11915 information

HIP 11915
Observation data; Epoch J2000 Equinox J2000
Constellation	Cetus
Right ascension	02h 33m 49.026s
Declination	–19° 36′ 42.500″
Apparent magnitude (V)	8.58
Characteristics
Evolutionary stage	Main sequence
Spectral type	G5V
Astrometry
Radial velocity (Rv)	+14.1 ± 0.5 km/s
Proper motion (μ)	RA: 225.590±0.082 mas/yr ; Dec.: 35.400±0.090 mas/yr
Parallax (π)	18.63 ± 0.29 mas
Distance	175 ± 3 ly ; (53.7 ± 0.8 pc)
Absolute magnitude (MV)	4.83
Details
Mass	0.991±0.003 M☉
Radius	~1.01 R☉
Luminosity	1.0+0.13; −0.12 L☉
Surface gravity (log g)	4.47±0.008 cgs
Temperature	5773±2 K
Metallicity [Fe/H]	−0.057±0.003 dex
Rotational velocity (v sin i)	0.99 ± 0.15 km/s
Age	3.87±0.39 Gyr
Other designations
	HD 16008, HIP 11915, SAO 148468, BD-20°481
Database references
SIMBAD	data

HIP 11915 is a G-type main-sequence star located about 190 light-years from Earth in the constellation Cetus.^[2] It is best known for its characteristics, which are very similar to those of the Sun, including the mass, radius, temperature, metallicity and age, which means that it is almost a solar twin, being just 500 million years younger than the Sun and with a lower metallicity.^[a] It is also known for its planetary companion, HIP 11915 b, which has a mass and orbital distance very similar to that of Jupiter, but probably with a slightly higher orbital eccentricity.

This star is entry number 11915 in the Hipparcos Catalogue. The star is located at 02:33:49.02495 right ascension, −19° 36' 42.5032" dec.^[1]^[8] Too faint to be seen with the unaided eye, the star can be spotted with good binoculars.^[8]

^ ^a ^b ^c ^d ^e ^f ^g ^h "HD 16008". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 29 March 2018.
^ ^a ^b ^c "Planet HIP 11915". Extrasolar Planets Encyclopaedia. Archived from the original on 26 January 2020. Retrieved 17 July 2015.
^ Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.
^ ^a ^b ^c ^d ^e Cite error: The named reference Galarza2021 was invoked but never defined (see the help page).
^ Cite error: The named reference Sousa2011 was invoked but never defined (see the help page).
^ "Solar Variability and Terrestrial Climate - NASA Science". Retrieved 8 January 2013.
^ Cite error: The named reference nssdc was invoked but never defined (see the help page).
^ ^a ^b "The star HIP 11915 in the constellation of Cetus". European Southern Observatory. 15 July 2015. Retrieved 17 July 2015.

Cite error: There are <ref group=lower-alpha> tags or {{efn}} templates on this page, but the references will not show without a {{reflist|group=lower-alpha}} template or {{notelist}} template (see the help page).

[SIMBAD-1] ^ ^a ^b ^c ^d ^e ^f ^g ^h "HD 16008". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 29 March 2018.

[Extrasolar-2] "Planet HIP 11915". Extrasolar Planets Encyclopaedia. Archived from the original on 26 January 2020. Retrieved 17 July 2015.

[Anderson2012-3] Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.

[Galarza2021-4] Cite error: The named reference Galarza2021 was invoked but never defined (see the help page).

[Sousa2011-5] Cite error: The named reference Sousa2011 was invoked but never defined (see the help page).

[6] "Solar Variability and Terrestrial Climate - NASA Science". Retrieved 8 January 2013.

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

[eso1529b-9] "The star HIP 11915 in the constellation of Cetus". European Southern Observatory. 15 July 2015. Retrieved 17 July 2015.

Observation data Epoch J2000 Equinox J2000
Constellation	Cetus
Right ascension	02^h 33^m 49.026^s^[1]
Declination	–19° 36′ 42.500″^[1]
Apparent magnitude (V)	8.58^[2]
Characteristics
Evolutionary stage	Main sequence
Spectral type	G5V^[2]
Astrometry

Radial velocity (R_v)	+14.1 ± 0.5^[1] km/s
Proper motion (μ)	RA: 225.590±0.082^[1] mas/yr Dec.: 35.400±0.090^[1] mas/yr
Parallax (π)	18.63 ± 0.29 mas^[1]
Distance	175 ± 3 ly (53.7 ± 0.8 pc)
Absolute magnitude (M_V)	4.83^[3]

Details

Mass	0.991±0.003^[4] `M`_☉
Radius	~1.01 `R`_☉
Luminosity	1.0+0.13 −0.12^[5] `L`_☉
Surface gravity (log g)	4.47±0.008^[4] cgs
Temperature	5773±2^[4] K
Metallicity [Fe/H]	−0.057±0.003^[4] dex
Rotational velocity (v sin i)	0.99 ± 0.15 km/s
Age	3.87±0.39^[4] Gyr

Other designations
HD 16008, HIP 11915, SAO 148468, BD-20°481^[1]
Database references
SIMBAD	data

HIP 11915 information

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