HD 195019

A Sun-like star in the constellation Delphinus around which has been found a three-Jupiter-mass extrasolar planet of the epistellar Jovian type.¹ Spectroscopic measurements of the host suggest that it is has a "quiet" chromosphere (an important factor in its suitability to support nearby life) and a metal-content somewhat greater than that of the Sun.

Host star
Distance	65.3 light-years (20 pc)
Spectral type	G3 IV-V
Apparent magnitude	6.91
Temperature	5,330°C (5,799 K)
Luminosity (Sun=1)	2.35
Mass (Sun=1)	0.95

Planet
Mass (Jupiter=1)	3.43 ± 0.4
Semi-major axis	0.14 AU (21 million km, 13 million miles)
Orbital period	18.3 ± 0.2 days
Eccentricity	0.05 ± 0.04
Discovery	1998 by Marcy et al., Lick and Keck Obs.
Method	radial velocity

Reference

Fischer, D., Marcy, G., Butler, P., Vogt, S., and Apps, K. , 1998. "Planetary companions around two solar type stars: HD 195019 and HD 217107," PASP, 111, 50.

Related categories

• NOTABLE STARS
• EXTRASOLAR PLANETS AND SUBSTELLAR OBJECTS

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