51 Eridani

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Star
51 Eridani
AladinLite
Observation
dates equinox :  J2000.0 , epoch : J2000.0
Constellation Eridanus
Right ascension 04 h 37 m 36.13 s
declination -02 ° 28 ′ 24.8 ″
Apparent brightness 5.223 mag
Typing
Known exoplanets 1
Spectral class F0IV
Astrometry
Radial velocity 12.60 ± 0.3 km / s
parallax 33.98 ± 0.34  mas
distance 96.0 ± 1.0  ly
29.4 ± 0.3  pc
Visual absolute brightness M vis 2.87 mag
Proper movement 
Rec. Share: 44.22 ± 0.34  mas / a
Dec. portion: −64.39 ± 0.27  mas / a
Physical Properties
Other names
and catalog entries
Bayer name c Eridani
Flamsteed name 51 Eridani
Bright Star Catalog HR 1474 [1]
Henry Draper Catalog HD 29391 [2]
Hipparcos catalog HIP 21547 [3]
SAO catalog SAO 131358 [4]
Tycho catalog TYC 4739-1551-1 [5]Template: Infobox star / maintenance / specification of the TYC catalog
2MASS catalog 2MASS J04373613-0228248 [6]

51 Eridani is a rating of the Spectral F in the constellation Eridanus , the light about 96 years from the earth is removed. With an apparent magnitude of around 5 mag, it can still be observed with the naked eye.

51 Eridani belongs to the Beta Pictoris movement cluster , which is named after the star Beta Pictoris in the painter constellation . The member stars of this cluster are still relatively young and are probably only about 23 million years old. In 2015 an exoplanet orbiting 51 Eridani was discovered (→ 51 Eridani b ), which could be detected by direct imaging . According to observations by the Herschel space telescope , the star is also surrounded by a disk of debris , the inner limitation of which is estimated to be around 82 AU and its mass to be less than 1.6 Earth's masses .

Individual evidence

  1. ↑ a b c d e f SIMBAD: 51 Eri. Retrieved August 14, 2015 .
  2. ↑ a b c d Mamajek, Eric E .; Bell, Cameron PM: On the age of the β Pictoris moving group . arxiv : 1409.2737 .
  3. ↑ a b Stars and Space, August 13, 2015: A young Jupiter orbiting 51 Eridani discovered. Retrieved August 14, 2015 .
  4. ↑ Gemini Observatory: Gemini-Discovered World is Most like Jupiter. Retrieved August 14, 2015 .