HD 4208 b

HD 4208 b
Exoplanet List of exoplanets
Parent star
Star HD 4208
Constellation Sculptor
Right ascension (α) 00h 44m 26.65s[1]
Declination (δ) –26° 30 56.4[1]
Distance106 ± 3[1] ly
(32.4 ± 0.8[1] pc)
Spectral type G5V
Orbital elements
Semi-major axis(a) 1.650 ± 0.096 AU
Periastron (q) 1.564 AU
Apastron (Q) 1.736 AU
Eccentricity (e) 0.052 ± 0.040
Orbital period(P) 828.0 ± 8.1 d
(2.267 y)
Orbital speed (υ) 21.75 km/s
Argument of
periastron
(ω) 345°
Time of periastron (T0) 2,451,040
± 120 JD
Semi-amplitude (K) 19.06 ± 0.73 m/s
Physical characteristics
Mass(m)>0.804 ± 0.073 MJ
Discovery information
Discovery date 15 October 2001
Discoverer(s) California and Carnegie
Planet Search
Discovery method Doppler Spectroscopy
Discovery site Keck telescope
Discovery status Published[2]
Database references
Extrasolar Planets
Encyclopaedia
data
SIMBADdata
Exoplanet Archivedata
Open Exoplanet Cataloguedata

The extrasolar planet, designated as HD 4208 b, was discovered by the California and Carnegie Planet Search team using the Keck telescope. The planet is probably somewhat less massive than Jupiter, although only its minimum mass is known. Its orbital distance is 1.67 AU, slightly further than Mars and its eccentricity is low.[2][3]

References

  1. 1 2 3 4 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752Freely accessible. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
  2. 1 2 Vogt, Steven S.; et al. (2002). "Ten Low-Mass Companions from the Keck Precision Velocity Survey". The Astrophysical Journal. 568 (1): 352–362. arXiv:astro-ph/0110378Freely accessible. Bibcode:2002ApJ...568..352V. doi:10.1086/338768.
  3. Butler, R. P.; et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal. 646 (1): 505–522. arXiv:astro-ph/0607493Freely accessible. Bibcode:2006ApJ...646..505B. doi:10.1086/504701.

External links

Coordinates: 00h 44m 26.65s, −26° 30′ 56.45″


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