Gliese 414
Observation data
Epoch J2000      Equinox J2000
Constellation Ursa Major
GJ 414 A[1]
Right ascension 11h 11m 05.88s
Declination +30° 26′ 42.61″
GJ 414 B[1]
Right ascension 11h 11m 03.26s
Declination +30° 26′ 38.12″
Characteristics
GJ 414 A
Spectral type K7V[2]
B−V color index 1.255[2]
Variable type None
GJ 414 B
Spectral type M2V[2]
B−V color index 2.41±0.34[2]
Variable type None
Astrometry
GJ 414 A
Proper motion (μ) RA: 591.622±0.0812 mas/yr[1]
Dec.: −197.247±0.0911 mas/yr[1]
Parallax (π)84.0803 ± 0.0470722 mas[1]
Distance38.76±0.22 ly
(11.889±0.067 pc)
Absolute magnitude (MV)8.864±0.012[2]
GJ 414 B
Proper motion (μ) RA: 604.831±0.0806 mas/yr[1]
Dec.: −206.442±0.0751 mas/yr[1]
Parallax (π)84.1971 ± 0.0579164 mas[1]
Distance38.7±0.00269 ly
(11.8728±0.00825 pc)
Absolute magnitude (MV)9.6[3]
Details[2]
GJ 414 A
Mass0.65±0.028 M☉
Radius0.679±0.027 R☉
Luminosity0.119±0.05 L☉
Habitable zone inner limit0.37 AU
Habitable zone outer limit0.70 AU
Temperature4120±70 K
Metallicity [Fe/H]0.24±0.09 dex
Rotational velocity (v sin i)3[4] km/s
Age12.4±5.2 Gyr
GJ 414 B
Mass0.542±0.022 M☉
Radius0.548±0.017 R☉
Luminosity0.05 L☉
Temperature3663±70 K
Metallicity [Fe/H]0.08±0.09 dex
Age11.2±5.9 Gyr
Other designations
Gliese 414, HD 97101, LHS 2367, DO 14370, HIC 54646, HIP 54646, LFT 767, LTT 13009, NLTT 26534, 2MASS J11110509+3026459, TIC 9001920, TYC 2520-2524-1, WDS J11111+3027A, WISEA J111105.67+302643.6, Gaia EDR3 732857558276385664[3]
Position (relative to Gliese 414 A)[2]
ComponentGliese 414 B
Angular distance34.34″
Projected separation408 AU
Database references
SIMBADdata

Gliese 414, also known as GJ 414, is a binary system made up of an orange dwarf and a red dwarf, located about 39 light years from Earth, in the constellation Ursa Major.[5][6] With an apparent magnitude of 8.31, it is not visible to the naked eye.[1]

Characteristics

The main component of the system, Gliese 414 A, is a relatively active orange dwarf, about 68% the size of the Sun and 65% its mass.[2] Its age is estimated at 12.4 billion years, about two and a half times the age of the Solar System.[2] It is orbited by two known exoplanets, called Gliese 414 Ab and Gliese 414 Ac.

The secondary component, Gliese 414 B, is a red dwarf of type M2V, that is 55% the size of the Sun and 54% its mass.[2] Unlike its companion star, Gliese 414 B is not orbited by any known planets.[6]

The closest star to the star system is CW Ursae Majoris, at a distance of 5.3 light-years.[6]

Nearest stars to Gliese 414[6]
Name Distance (light-years)
CW Ursae Majoris 5.3
DS Leonis 5.9
2MASS J10475+2124 7.8
Gliese 1138 8.1
Gliese 1134 8.3

Planetary system

The primary star, Gliese 414 A, is orbited by two exoplanets.[2] They were discovered in 2020 by analyzing radial velocity data from Keck's HIRES instrument and the Automated Planet Finder at Lick Observatory, as well as photometric data from KELT.[7]

The Gliese 414 A planetary system
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b ≥8.78+3.1
−2.47 M🜨		 0.24±0.01 50.817+0.031
−0.03		 0.45+0.19
−0.22		 — 2.95+1.11
−0.91 R🜨
c ≥56.27+10.43
−9.91 M🜨		 1.43±0.06 748.3+1.3
−1.2		 0.105+0.110
−0.703		 — 8.78+4.03
−2.66 R🜨

References

  1. 1 2 3 4 5 6 7 8 9 "Gliese 414 Overview". NASA Exoplanet Archive. Retrieved December 13, 2023.
  2. 1 2 3 4 5 6 7 8 9 10 11 Dedrick, Cayla M.; Fulton, Benjamin J.; Knutson, Heather A.; Howard, Andrew W.; Beatty, Thomas G.; Cargile, Phillip A.; Gaudi, B. Scott; Hirsch, Lea A.; Kuhn, Rudolf B.; Lund, Michael B.; James, David J.; Kosiarek, Molly R.; Pepper, Joshua; Petigura, Erik A.; Rodriguez, Joseph E. (2021-02-01). "Two Planets Straddling the Habitable Zone of the Nearby K Dwarf Gliese 414 A". The Astronomical Journal. 161 (2): 86. arXiv:2009.06503. Bibcode:2021AJ....161...86D. doi:10.3847/1538-3881/abd0ef. ISSN 0004-6256.
  3. 1 2 "★ Gliese 414". Stellar Catalog. Retrieved 2023-12-13.
  4. ↑ Nordström, B.; Mayor, M.; Andersen, J.; Holmberg, J.; Pont, F.; Jørgensen, B. R.; Olsen, E. H.; Udry, S.; Mowlavi, N. (2004-05-01). "The Geneva-Copenhagen survey of the Solar neighbourhood. Ages, metallicities, and kinematic properties of ∼14 000 F and G dwarfs". Astronomy and Astrophysics. 418: 989–1019. arXiv:astro-ph/0405198. Bibcode:2004A&A...418..989N. doi:10.1051/0004-6361:20035959. ISSN 0004-6361.
  5. ↑ "Find the constellation which contains given sky coordinates". djm.cc. Retrieved 2023-12-15.
  6. 1 2 3 4 "★ Gliese 414". Stellar Catalog. Retrieved 2023-12-14.
  7. ↑ "Open Exoplanet Catalogue - Gliese 414 Ab". www.openexoplanetcatalogue.com. Retrieved 2023-12-14.
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