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Epsilon Indi Ab information


Epsilon Indi Ab
Discovery[1]
Discovered byFabo Feng, et al.
Discovery date21 March 2018 (suspected since 2002)
Detection method
Radial velocity
Orbital characteristics[2]
Epoch 2448929.56 JD[3]
Semi-major axis
8.8+0.2
−0.1
 AU
Eccentricity0.48±0.01
Orbital period (sidereal)
10,932+266
−228
 d

29.93+0.73
−0.62
 yr
Mean anomaly
143.8°+23.38°
−58.75°
[3]
Inclination91°+4°
−5°
Longitude of ascending node
58°±
Time of periastron
2442332.95+2353.42
−3450.17
 JD
[3]
Argument of periastron
85°±
Semi-amplitude29.22+5.45
−6.07
 m/s
[3]
StarEpsilon Indi A
Physical characteristics[2]
Mass3.0±0.1 MJ

Epsilon Indi Ab is a gas giant exoplanet orbiting the star Epsilon Indi A, about 11.9 light-years away in the constellation of Indus. The planet was confirmed to exist in 2018.[1] It orbits at around 8.8 AU with a period of around 29.9 years and a relatively high eccentricity of 0.48, and has a mass around 3 times that of Jupiter.[2] Direct imaging of this planet using the James Webb Space Telescope is planned.[4]

The Epsilon Indi system also contains a pair of brown dwarfs, Epsilon Indi Ba and Bb, at a wide separation from the primary star. As such, this system provides a benchmark case for the study of the formation of gas giants and brown dwarfs.[1]

  1. ^ a b c Cite error: The named reference Feng2018 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference Philipot2023 was invoked but never defined (see the help page).
  3. ^ a b c d Cite error: The named reference Feng2019 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference JWSTProposal2243 was invoked but never defined (see the help page).

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Epsilon Indi Ab

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Epsilon Indi Ab is a gas giant exoplanet orbiting the star Epsilon Indi A, about 11.9 light-years away in the constellation of Indus. The planet was confirmed...

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Epsilon Indi

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Epsilon Indi, Latinized from ε Indi, is a star system located at a distance of approximately 12 light-years from Earth in the southern constellation of...

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radial vel. 64.43 1.76 DS Tucanae Ab 0.509±0.015 8.138268±0.000011 850 transit 143.89±0.22 1.01±0.06 5428±80 Epsilon Indi Ab 3.25 16510 11.55 64.25 radial...

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HD 102365

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large proper motion. The HR 4523 system is presently located within the Epsilon Indi Moving Group, although it gives itself away as an interloper, since the...

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Gliese 570

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have been confirmed to exist in this multiple star system thus far. Epsilon Indi Gliese 229 HD 188753 Iota Horologii Phi2 Pavonis From L=4πR2σTeff4, where...

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61 Cygni

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Retrieved 12 May 2020. 'I find that certain nearby K stars like 61 Cyg A/B, Epsilon Indi, Groombridge 1618, and HD 156026 may be particularly good targets for...

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Wolf 1061c

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K-type Epsilon Eridani (Ran) (10.4749±0.0037 ly) 1 (2?) planets: b (Ægir), c? 61 Cygni (11.4039±0.0012 ly) K-type main-sequence star B Epsilon Indi (11.8670±0...

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orbit around GJ 229. Given the proximity to the Sun, the orbit of GJ 229 Ab might be fully characterized by the Gaia space-astrometry mission or via direct...

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Brown dwarf

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800 brown dwarfs have been identified, even some very close to Earth like Epsilon Indi Ba and Bb, a pair of brown dwarfs gravitationally bound to a Sun-like...

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VB 10

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K-type Epsilon Eridani (Ran) (10.4749±0.0037 ly) 1 (2?) planets: b (Ægir), c? 61 Cygni (11.4039±0.0012 ly) K-type main-sequence star B Epsilon Indi (11.8670±0...

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List of nearest exoplanets

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conditions (with effort). The star Epsilon Eridani was named Ran (after Rán, the Norse goddess of the sea), and the planet Epsilon Eridani b was named AEgir (after...

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F5IIkF2IImF5II 3.41 1.85 2.78 (2.68 – 2.87) The nearest bright giant. Epsilon Scorpii (Larawag) 63.7±0.3 K1 III 12.6 1.24 2.31 (2.24 – 2.35) Nu2 Canis...

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Gliese 445

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K-type Epsilon Eridani (Ran) (10.4749±0.0037 ly) 1 (2?) planets: b (Ægir), c? 61 Cygni (11.4039±0.0012 ly) K-type main-sequence star B Epsilon Indi (11.8670±0...

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Methods of detecting exoplanets

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Hipparcos was complemented with HARPS data enabling a better description of ε Indi Ab as the second-closest Jupiter-like exoplanet with a mass of 3 Jupiters...

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Fritz (20 April 2021). "Precision Millimeter Astrometry of the α Centauri AB System". The Astronomical Journal. 162 (1): 14. arXiv:2104.10086. Bibcode:2021AJ...

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K-type Epsilon Eridani (Ran) (10.4749±0.0037 ly) 1 (2?) planets: b (Ægir), c? 61 Cygni (11.4039±0.0012 ly) K-type main-sequence star B Epsilon Indi (11.8670±0...

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Altair

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K-type Epsilon Eridani (Ran) (10.4749±0.0037 ly) 1 (2?) planets: b (Ægir), c? 61 Cygni (11.4039±0.0012 ly) K-type main-sequence star B Epsilon Indi (11.8670±0...

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Delta Pavonis

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K-type Epsilon Eridani (Ran) (10.4749±0.0037 ly) 1 (2?) planets: b (Ægir), c? 61 Cygni (11.4039±0.0012 ly) K-type main-sequence star B Epsilon Indi (11.8670±0...

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Eta Cassiopeiae

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Groombridge 1618

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Sigma Draconis

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Kitchen, refers to an asterism consisting of Sigma Draconis, Delta Draconis, Epsilon Draconis, Rho Draconis, 64 Draconis (see 64 Draconis (Portuguese)) and...

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Gliese 752

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K-type Epsilon Eridani (Ran) (10.4749±0.0037 ly) 1 (2?) planets: b (Ægir), c? 61 Cygni (11.4039±0.0012 ly) K-type main-sequence star B Epsilon Indi (11.8670±0...

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GJ 1002

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