astro.wikisort.org - Meteorite

HD 122430 b is a proposed giant planet orbiting around the giant star HD 122430. It has a mass at least 3.71 times that of Jupiter. This planet located at a distance of 1.02 astronomical units away from its star, which is very similar to the Earth's distance from the Sun. Despite this, the higher luminosity of the star implies it is heated much more strongly than the Earth is. Its orbit is highly eccentric, around 68%. At periastron, the orbital distance from its parent star is 0.33 AU. At apastron, the distance is 1.71 AU. If this planet were in the Solar System, its orbit would range from just within Mercury's orbit to just beyond Mars's orbit.

HD 122430 b

Discovery
Discovered by	Setiawan et al.
Discovery site	Spain
Discovery date	April 14, 2003
Detection method	radial velocity
Orbital characteristics
Apastron	1.71 AU (256 Gm)
Periastron	0.33 AU (49 Gm)
Semi-major axis	1.02 AU (153 Gm)
Eccentricity	0.68±0.09
Orbital period (sidereal)	344.95±1.08 d 0.94441 y
Average orbital speed	32.3
Time of periastron	2451986.71±3.75
Argument of periastron	91.04±17.27
Semi-amplitude	2.02
Star	HD 122430

In Spain, Setiawan discovered this planet in 2003, using the radial velocity method.[1] However, a follow-up study by Soto et al. (2015) failed to detect a signal via the radial velocity method, so it remains unconfirmed.[2]

See also

• HD 47536 b
• HD 47536 c

References

External links

• "HD 122430". Exoplanets. Archived from the original on 2009-11-25. Retrieved 2008-11-04.

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