HD 188015 b explained

HD 188015 b
Discoverer:Marcy et al.
Discovery Site: United States
Discovered:January 25, 2005
Apsis:astron
Aphelion:1.368AU
Perihelion:1.038AU
Semimajor:1.203±
Eccentricity:0.137 ± 0.026
Period:461.2 ± 1.7 d
1.263 y
Avg Speed:28.47
Time Periastron:2,451,787 ± 17
Arg Peri:222° ± 10
Semi-Amplitude:37.6 ± 1.2
Mass:>1.50 ± 0.13

HD 188015 b is an extrasolar planet announced by the California and Carnegie Planet Search team in 2005. Like majority of known planets, it was discovered using the radial velocity method.

The planet has a minimum mass of about 1.25 Jupiter masses. It orbits HD 188015 in a slightly eccentric orbit with a semi-major axis about 20% further than Earth's.

Stability analysis reveals that if Earth-sized planets existed at the Trojan points of HD 188015 b, their orbits would be stable for long periods of time.[1]

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Notes and References

  1. Astronomy & Astrophysics . 10.1051/0004-6361:20077994 . 474 . 3. 1023–1029 . Survey of the stability region of hypothetical habitable Trojan planets . R. Schwarz . R. Dvorak . Á. Süli . B. Érdi . 2007A&A...474.1023S . November 2007. free .

    HD 93083, HD 17051, HD 28185, HD 27442, HD 188015, HD 99109, HD 221287