HIP 11915

HIP 11915
Observation data
Epoch J2000      Equinox J2000
Constellation Cetus
Right ascension 02h 33m 49.026s[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 (Rv)14.45±0.14[3] km/s
Proper motion (μ) RA: +223.559 mas/yr[3]
Dec.: +35.513 mas/yr[3]
Parallax (π)18.6292 ± 0.0224 mas[3]
Distance175.1 ± 0.2 ly
(53.68 ± 0.06 pc)
Absolute magnitude (MV)4.83[4]
Details
Mass0.991±0.003[5] M☉
Radius0.974±0.001[3] R☉
Luminosity1.0+0.13
−0.12[6] L☉
Surface gravity (log g)4.47±0.008[5] cgs
Temperature5773±2[5] K
Metallicity [Fe/H]−0.057±0.003[5] dex
Rotational velocity (v sin i)0.99 ± 0.15 km/s
Age3.87±0.39[5] Gyr
Other designations
HD 16008, HIP 11915, SAO 148468, BD-20°481[1]
Database references
SIMBADdata

HIP 11915 is a G-type main-sequence star located about 170 light-years from Earth in the constellation Cetus. 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][9] Too faint to be seen with the unaided eye, the star can be spotted with good binoculars.[9]

  1. ^ a b c d "HD 16008". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 29 March 2018.
  2. ^ a b "Planet HIP 11915". Extrasolar Planets Encyclopaedia. Archived from the original on 26 January 2020. Retrieved 17 July 2015.
  3. ^ a b c d Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  4. ^ 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.
  5. ^ a b c d e Cite error: The named reference Galarza2021 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Sousa2011 was invoked but never defined (see the help page).
  7. ^ "Solar Variability and Terrestrial Climate - NASA Science". Retrieved 8 January 2013.
  8. ^ Cite error: The named reference nssdc was invoked but never defined (see the help page).
  9. ^ a b "The star HIP 11915 in the constellation of Cetus". European Southern Observatory. 15 July 2015. Retrieved 17 July 2015.


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