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 — —
gollark: Interesting question. You should download their entire revision history dump and analyze it.
gollark: Also, apparently if you could transmit information faster than light that would break causality, which would be bad.
gollark: According to xkcd, keeping updated would only require 5 printers worth of throughput, which is not very much in terms of bitrate.
gollark: I mean, it's probably way more complicated, but basically you can't send information faster than light that way.
gollark: Anyway, my knowledge of this is not very detailed, but IIRC quantum entanglement means that if you observe one particle the other one collapses into another state, or something like that, and you don't control which state is picked, so you can't send any data.

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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