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