HAT-P-4
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Star HAT-P-4 / BD + 36 ° 2593 |
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| AladinLite | |||||||||
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Observation dates equinox : J2000.0 , epoch : J2000.0 |
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| Constellation | Bear keeper | ||||||||
| Right ascension | 15 h 19 m 58 s | ||||||||
| declination | + 36 ° 13 ′ 47 ″ | ||||||||
| Apparent brightness | 11.2 mag | ||||||||
| Typing | |||||||||
| Known exoplanets | 1 | ||||||||
| Spectral class | F or G | ||||||||
| Astrometry | |||||||||
| distance | (1000 ± 100) ly (310 ± 30) pc |
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| Proper movement | |||||||||
| Rec. Share: | −14.1 mas / a | ||||||||
| Dec. portion: | −20.1 mas / a | ||||||||
| Physical Properties | |||||||||
| Dimensions | 1.26 +0.06−0.14 M ☉ | ||||||||
| radius | (1.59 ± 0.07) R ☉ | ||||||||
| Effective temperature | (5860 ± 80) K. | ||||||||
| Metallicity [Fe / H] | 0.24 ± 0.08 | ||||||||
| Age | 4.2 +2.6−0.6Billion a | ||||||||
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Other names and catalog entries |
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HAT-P-4 is a yellow dwarf located about 1000 light-years from Earth in the Bear Keeper constellation . It has an apparent magnitude of 11.2 mag. In 2007 the HATNet Project discovered an extrasolar planet orbiting this star. This is called HAT-P-4b .
See also
Web links
- SIMBAD
- Encyclopedia of Exoplanets ( Memento from May 31, 2012 in the Internet Archive )