HD 195019

HD 195019 (HIP 100970, SAO 106138) is a star system in the constellation of Delphinus. Star B is located approximately 150 AU from Star A. This star system is located 123 light-years (38 parsecs) away from the Sun, Earth and Solar System. HD 195019 A is a yellow dwarf or subgiant [G3IV-V]. Star B is a smaller and dimmer orange dwarf of the K3 type. [2]

HD 195019
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Delphinus
Right ascension  20h 28m 18.6367s[1]
Declination +18° 46′ 10.1799″[1]
Apparent magnitude (V) 6.91
Characteristics
Spectral type G3IV-V
Astrometry
Proper motion (μ) RA: 349.644±0.058[1] mas/yr
Dec.: −56.571±0.059[1] mas/yr
Parallax (π)26.5188 ± 0.0467[1] mas
Distance123.0 ± 0.2 ly
(37.71 ± 0.07 pc)
Details
Other designations
BD+18° 4505, GCRV 12790, HD 195019 HIP 100970, LTT 15981, NLTT 49312, SAO 106138
Database references
SIMBADdata

Planetary system

In 1998, a planet was discovered at Lick Observatory, orbiting around Star A.[3]

The HD 195019 planetary system[4]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b >3.69 ± 0.30 MJ 0.1388 ± 0.0080 18.20132 ± 0.00039 0.0138 ± 0.0044 — —

See also

References
  1. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  2. http://stars.astro.illinois.edu/sow/hd195019.html
  3. Fischer, Debra A.; et al. (1999). "Planetary Companions around Two Solar-Type Stars: HD 195019 and HD 217107". Publications of the Astronomical Society of the Pacific. 111 (755): 50–56. arXiv:astro-ph/9810420. Bibcode:1999PASP..111...50F. doi:10.1086/316304.
  4. Butler, R. P.; et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal. 646 (1): 505–522. arXiv:astro-ph/0607493. Bibcode:2006ApJ...646..505B. doi:10.1086/504701.


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