Gliese 682

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Gliese 682
Scorpius constellation map.svg
Red pog.png
Gliese 682
Location of Gliese 682 in the constellation Scorpius

Observation data
Epoch J2000       Equinox
Constellation Scorpius
Right ascension 17h 37m 03.6655s [1]
Declination −44° 19 09.166 [1]
Apparent magnitude  (V)10.94 [2]
Characteristics
Spectral type M3.5V [3]
Apparent magnitude  (B)~12.61 [4]
Apparent magnitude  (V)~10.96 [4]
Apparent magnitude  (J)6.544 ±0.023 [4]
Apparent magnitude  (H)5.917 ±0.038 [4]
Apparent magnitude  (K)5.606 ±0.020 [4]
Astrometry
Radial velocity (Rv)−34.90±0.30 [1]  km/s
Proper motion (μ)RA: −705.945±0.035  mas/yr [1]
Dec.: −938.080±0.021  mas/yr [1]
Parallax (π)199.6944 ± 0.0312  mas [1]
Distance 16.333 ± 0.003  ly
(5.0077 ± 0.0008  pc)
Absolute magnitude  (MV)12.4 [5]
Details
Mass 0.27 [3]   M
Radius 0.30 [2]   R
Luminosity 0.008118 [3]   L
Surface gravity (log g)4.95 [6]   cgs
Temperature 3,237 [2]   K
Metallicity [Fe/H]0.05±0.09 [6]   dex
Rotational velocity (v sin i)3.42 [7]  km/s
Age 6.4±4.3 [6]   Gyr
Other designations
CD−44 11909, GJ 682, LHS 451, LFT 1358, HIP 86214, PLX 3992.
Database references
SIMBAD star
planet b
planet c
Exoplanet Archive data
ARICNS data

Gliese 682 or GJ 682 is a red dwarf. It is listed as the 53rd-nearest known star system to the Sun, [8] being 16.3 light years away from the Earth. Even though it is close by, it is dim with a magnitude of 10.95 and thus requires a telescope to be seen. It is located in the constellation of Scorpius, near the bright star Theta Scorpii. [4] The star is in a crowded region of sky near the Galactic Center, and so appears to be near a number of deep-sky objects from the Solar System's perspective. The star is only 0.5 degrees from the much more distant globular cluster NGC 6388.

Contents

Search for planets

The Gliese 682 planetary system [9]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b(unconfirmed)>4.4 M🜨 0.0817.480.08
c(unconfirmed)>8.7 M🜨 0.1857.320.10

Two candidate planets were detected orbiting Gliese 682 in 2014, one of which would be in the habitable zone. [9] [10] However, a 2020 study did not find these planets and concluded that the radial velocity signals were probably caused by stellar activity. [11]

See also

Related Research Articles

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−12
° with the planetary orbit. Although star with a giant planet on close orbit is expected to be spun-up by tidal forces, only weak indications of tidal spin-up were detected.

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References

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