Binary star system in the constellation Ursa Major
Gliese 414
Observation dataEpoch J2000 Equinox J2000
Constellation Ursa Major [ note 1]
GJ 414 A[ 1]
Right ascension 11h 11m 05.17s
Declination +30° 26′ 45.7″
Apparent magnitude (V)± 0.012[ 2]
GJ 414 B[ 3]
Right ascension 11h 11m 02.54s
Declination +30° 26′ 41.3″
Apparent magnitude (V)10[ 3]
Characteristics
GJ 414 A
Spectral type
K7V[ 1]
B−V color index
[ 2]
Variable type
None
GJ 414 B
Spectral type
M2V[ 3]
B−V color index
± 0.34[ 2]
Variable type
None
Astrometry GJ 414 A Radial velocity (Rv )[ 1] Proper motion (μ) RA: ± 0.0812mas /yr [ 4] Dec.: ± 0.0911mas /yr [ 4] Parallax (π)84.1766 ± 0.0258 mas [ 1] Distance 38.75 ± 0.01 ly pc ) GJ 414 B Radial velocity (Rv )[ 3] Proper motion (μ) RA: ± 0.0806mas /yr [ 4] Dec.: ± 0.0751mas /yr [ 4] Parallax (π)84.1554 ± 0.0200 mas [ 3] Distance 38.756 ± 0.009 ly pc ) Details[ 2] GJ 414 A Mass ± 0.08M ☉ Radius ± 0.14R ☉ Luminosity ± 0.013L ☉ Habitable zone inner limitAU Habitable zone outer limitTemperature ± 109K Metallicity ± 0.1dex Rotational velocity (v sin i )[ 5] Age ± 5.2Gyr GJ 414 B Mass ± 0.022M ☉ Radius ± 0.017R ☉ Luminosity L ☉ Temperature ± 70K Metallicity ± 0.09dex Age ± 5.9Gyr 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
[ 1]
Position (relative to Gliese 414 A) [ 2]
Component Gliese 414 B Angular distance 34.34″ Projected separation 408 AU Database references SIMBAD data
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 .[ 6] [ note 1] apparent magnitude of 8.31, it is not visible to the naked eye .[ 4] [ 6] exoplanets .[ 7]
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] Solar System .[ 2] 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] [ 6]
The binary star system is located in the northern hemisphere , approximately 38.8 light years from Earth, in the direction of the constellation Ursa Major .[ 4] [ note 1] [ 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] radial velocity data from Keck 's HIRES instrument and the Automated Planet Finder at Lick Observatory , as well as photometric data from KELT .[ 7] [ 8]
The innermost planet, Gliese 414 Ab , orbits its star at an average distance of 0.23 astronomical units , making it close to the optimistic habitable zone .[ 2] eccentric (e = 0.45), which causes the distance from its star to vary from 0.13 to 0.34 AU, and its equilibrium temperature is calculated at 36 °C.[ 2] minimum mass of 7.6 M E , it is likely to have a significant volatile -rich envelope, thus being a poor candidate for habitability.[ 2] [ 8]
The outermost planet, Gliese 414 Ac , is a super-Neptune that orbits its star at a greater distance of 1.4 astronomical units, which makes it a frigid planet, having an equilibrium temperature of about -150 °C.[ 2] direct imaging missions.[ 2] [ 7] [ 8]
See also
Notes and references
^ a b c d e f "HD 97101" . SIMBAD . Retrieved January 16, 2024 .^ a b c d e f g h i j k l m n 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. (January 2021). "Two Planets Straddling the Habitable Zone of the Nearby K Dwarf Gl 414A" . The Astronomical Journal . 161 (2): 86. arXiv :2009.06503 Bibcode :2021AJ....161...86D . doi :10.3847/1538-3881/abd0ef ISSN 1538-3881 . ^ a b c d e "HD 97101B" . SIMBAD . Retrieved January 16, 2024 .^ a b c d "Gliese 414 Overview" . NASA Exoplanet Archive . Archived from the original on December 9, 2023. Retrieved December 13, 2023 .^ 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 . Archived from the original on 2022-09-22. Retrieved 2024-06-07 . ^ a b c d e "★ Gliese 414" . Stellar Catalog . Archived from the original on 2023-12-13. Retrieved 2023-12-14 .^ a b c "Open Exoplanet Catalogue - Gliese 414 Ab" . www.openexoplanetcatalogue.com . Archived from the original on 2023-12-14. Retrieved 2023-12-14 .^ a b c Anderson, Natali (2020-09-21). "Astronomers Find Two Massive Exoplanets in Nearby Binary System | Astronomy | Sci-News.com" . Sci.News: Breaking Science News . Archived from the original on 2024-01-13. Retrieved 2024-01-13 .
^ a b c Constellation obtained with a right ascension of 11h 11m 5.17s and a declination of +30° 26′ 45.7″[ 1] website .
