Peter 436

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Star
gliese 436
AladinLite
Observation
dates equinox :  J2000.0 , epoch : J2000.0
Constellation lion
Right ascension 11 h 42 m 11.09 s
declination + 26 ° 42 ′ 23.7 ″
Apparent brightness 10.67 likes
Typing
Known exoplanets 1
B − V color index (+1.49 ± 0.02) 
R − I index (+2.03) 
Spectral class M3 V
Astrometry
Radial velocity (9.61 ± 0.1) km / s
parallax (102.50 ± 0.09)  mas
distance (31.80 ± 0.03)  ly
(9.76 ± 0.01)  pc
Visual absolute brightness M vis +10.64 mag
Proper movement 
Rec. Share: (895.05 ± 0.13)  mas / a
Dec. portion: (−814.03 ± 0.12)  mas / a
Physical Properties
Dimensions (0.45 ± 0.01)  M ☉
radius (0.46 ± 0.01)  R ☉
Effective temperature (3684 ± 55)  K.
Metallicity [Fe / H] - (0.32 ± 0.12)
Other names
and catalog entries
Gliese catalog FY 436 [1]
Hipparcos catalog HIP 57087 [2]
Tycho catalog TYC 1984-2613-1 [3]
2MASS catalog 2MASS J11421096 + 2642251 [4]
Other names LHS 310 • LFT 838 • Ross 905
annotation
  1. ↑ Calculated from apparent brightness and distance.

Gliese 436 (also GJ 436 ) is a red dwarf at a distance of 9.76  parsecs (about 32  light years ) in the constellation Leo . The star is orbited by an exoplanet called Gliese 436 b . In addition, the discovery of another exoplanet called Gliese 436 c was announced in July 2012 , but this could not be confirmed.

Gliese 436 belongs to the spectral class M3 V. Despite its relative proximity to the sun, Gliese 436 is therefore relatively faint with an apparent brightness of only 10.67 mag and cannot be seen with the naked eye. The star is presumably older than our sun , its surface temperature is a lot lower at about 3700 K; in addition, the star shows only a small amount of magnetic activity in its chromosphere .

Web links

Individual evidence

  1. ↑ a b c d e f Ross 905. In: SIMBAD . Center de Données astronomiques de Strasbourg , accessed on November 17, 2019 .
  2. ^ Hipparcos catalog (ESA 1997)
  3. ^ Hipparcos, the New Reduction (van Leeuwen, 2007)
  4. ↑ a b c d GJ 436 b. In: Extrasolar Planets Encyclopaedia . Retrieved November 17, 2019 .