682

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Star
gliese 682
AladinLite
Observation
dates equinoxJ2000.0 , epoch : J2000.0
Constellation Scorpio
Right ascension 17 h 37 m 3.66 s
declination -44 ° 19 ′ 9.2 ″
Apparent brightness 10.95 likes
Typing
Known exoplanets 2
Spectral class M3.5
Astrometry
Radial velocity −60.0 km / s
parallax 199.70 ± 0.08  mas
distance 16.32 ± 0.01  ly
5.01  pc
Visual absolute brightness M vis 12.45 mag
Proper movement 
Rec. Share: −706.12 ± 0.19  mas / a
Dec. portion: −937.91 ± 0.12  mas / a
Physical Properties
Dimensions (0.281 ± 0.006)  M
radius (0.298 ± 0.009)  R
Luminosity

0.0022  L

Effective temperature 3,028  K
Other names
and catalog entries
Cordoba Survey CD −44 ° 11909
Gliese catalog FY 682 [1]
Hipparcos catalog HIP 86214 [2]
Tycho catalog TYC 7896-3808-1 [3]Template: Infobox star / maintenance / specification of the TYC catalog
2MASS catalog 2MASS J17370367-4419088 [4]
Other names LHS 451, LFT 1358, PLX 3992

Gliese 682 (also GJ 682 ) is a red dwarf in the constellation Scorpio , which is around 16 light years away and is one of the sun's neighboring stars . Despite its comparatively close proximity, it is very faint with an apparent brightness of 10.95 mag and a relatively powerful telescope is necessary for its observation . From Earth, it is near the bright star Sargas (Theta Scorpii). Two exoplanets are believed to be in orbits around the star, one of which is in the habitable zone .

distance

Determining the distance for Gliese 682

source Parallax (mas) Distance (pc) Distance (Lj) Distance ( Pm )
Woolley et al. (1970) 213 ± 5 4.69 ± 0.11 15.3 ± 0.4 144.9   +3.5−3.3
Gliese & Jahreiß (1991) 211.6 ± 5.9 4.73   +0.14−0.13 15.4 ± 0.4 145.8   +4.2−4
van Altena et al. (1995) 210.7 ± 7.0 4.75   +0.16−0.15 15.5 ± 0.5 146.4   +5−4.7
Perryman et al. (1997) (Hipparcos) 198.32 ± 2.43 5.04 ± 0.06 16.45 ± 0.2 155.6 ± 1.9
van Leeuwen (2007) 196.90 ± 2.15 5.08   +0.06−0.05 16.56 ± 0.18 156.7 ± 1.7
RECONS TOP100 (2012) 198.09 ± 2.06 5.05 ± 0.05 16.47 ± 0.17 155.8 ± 1.6
Gaia DR2 199.70 ± 0.08 5.007 ± 0.002 16.32 ± 0.01 154.36 ± 0.06

Non-trigonometric distance determinations are marked in italics . The most precise determination is marked in bold .

Planetary system

On March 4, 2014, an international team of astronomers, led by Mikko Tuomi from the University of Hertfordshire, published the discovery of eight exoplanet candidates around the solar stars Gliese 180 , Gliese 442 , and Gliese 682. Four of these planets are super-earths in the habitable zone, two of them in orbits around Gliese 682. In accordance with the usual procedure for naming exoplanets, these are named Gliese 682b and Gliese 682c . Gliese 682b is the closest and smaller of the two planets to the star. It has a minimum mass of 4.4 earth masses and a radius of 1.5 earth radii assuming a rocky composition. At the time of discovery of both exoplanets, Gliese 682 was the second closest star with possibly habitable planets (after Tau Ceti ). In the meantime, however, with Gliese 832c and Kapteyn b , planet candidates still closer to the Sun have been found, which also orbit in the habitable zone of their central stars.

Planetary system of Gliese 682

Planet
(by distance from the star)
Discovery
(year)
Mass
(in M )
Cycle time
(in days)
Major semi-axis
(in AU )
eccentricity
Gliese 682 b 2014 0.014   +0.012−0.008 17.478   +0.062−0.04 0.08   +0.014−0.004 0.08   +0.19−0.08
Gliese 682 c 2014 0.027   +0.018−0.014 57.32   +0.45−0.48 0.176   +0.03−0.009 0.1   +0.19−0.1

Individual evidence

  1. a b c d e f g CD − 44 11909. In: SIMBAD . Center de Données astronomiques de Strasbourg , accessed April 20, 2019 .
  2. a b P. E. Kervella, F. Arenou, F. Mignard, F. Thévenin: Stellar and substellar companions of nearby stars from Gaia DR2. Binarity from proper motion anomaly . In: Astronomy & Astrophysics . 623, p. A72. arxiv : 1811.08902 . bibcode : 2019A & A ... 623A..72K . doi : 10.1051 / 0004-6361 / 201834371 .
  3. a b Tuomi, Mikko; Jones, Hugh RA; Barnes, John R .; Anglada-Escude, Guillem; Jenkins, James S .: Bayesian search for low-mass planets around nearby M dwarfs. Estimates for occurrence rate based on global detectability statistics . arxiv : 1403.0430 .
  4. ^ A b University of Puerto Rico at Arecibo: Habitable Exoplanets Catalog. Retrieved April 29, 2015 .
  5. University of Puerto Rico at Arecibo: GJ 682 b (warm-superterran). Retrieved April 29, 2015 .
  6. ^ Woolley R .; Epps EA; Penston MJ; Pocock SB: Woolley 682. Retrieved April 29, 2015 .
  7. Gliese, W. and Jahreiß, H .: Gl 682. Retrieved April 29, 2015 .
  8. ^ Van Altena WF, Lee JT, Hoffleit ED: GCTP 3992. Retrieved April 29, 2015 .
  9. ^ Perryman et al .: HIP 86214. Retrieved April 29, 2015 .
  10. ^ Van Leeuwen F .: HIP 86214. Retrieved April 29, 2015 .
  11. RECONS: THE ONE HUNDRED NEAREST STAR SYSTEMS. Retrieved April 29, 2015 .
  12. The star in VizieR. In: Gaia DR2 . Center de Données astronomiques de Strasbourg , accessed August 26, 2018 .
  13. ^ A b University of Puerto Rico at Arecibo: Stars with Multiple Habitable Planets Might be Common. Retrieved April 30, 2015 .
  14. ^ The Extrasolar Planets Encyclopaedia: Planet GJ 682 b. Retrieved April 30, 2015 .
  15. ^ The Extrasolar Planets Encyclopaedia: Planet GJ 682 c. Retrieved April 30, 2015 .

Web links