HD 195019 b
| Exoplanet | List of exoplanets | |
|---|---|---|
| Parent star | ||
| Star | HD 195019 | |
| Constellation | Delphinus | |
| Right ascension | (α) | 20h 28m 18.6363s |
| Declination | (δ) | +18° 46′ 10.188″ |
| Distance | 65 ly (20 pc) | |
| Spectral type | G3IV-V | |
| Orbital elements | ||
| Semi-major axis | (a) | 0.1388 ± 0.008 AU (20.76 Gm) |
| Periastron | (q) | 0.1369 AU (20.48 Gm) |
| Apastron | (Q) | 0.1407 AU (21.05 Gm) |
| Eccentricity | (e) | 0.014 ± 0.0044 |
| Orbital period | (P) | 18.20163 ± 0.0004 d (0.4983248 y) |
| Orbital speed | (υ) | 83.24 km/s |
| Argument of periastron |
(ω) | 322 ± 20° |
| Time of periastron | (T0) | 2,411,015 ± 1.2 JD |
| Semi-amplitude | (K) | 272.3 ±1.4 m/s |
| Physical characteristics | ||
| Minimum mass | (m sin i) | 3.7 MJ (1200 M⊕) |
| Discovery information | ||
| Discovery date | 1998 | |
| Discoverer(s) | Fischer et al.[1] | |
| Discovery method | Radial Velocity | |
| Discovery site | Lick Observatory | |
| Discovery status | Published[1] | |
| Database references | ||
| Extrasolar Planets Encyclopaedia | data | |
| SIMBAD | data | |
| Exoplanet Archive | data | |
| Open Exoplanet Catalogue | data | |
HD 195019 b is an exoplanet orbiting around HD 195019 in the binary star system. It has a minimum mass of 3.7 MJ. It orbits very close to the star. Like many planets at close distance, its orbit is circular, even more circular or less eccentric than Earth. It takes 437 hours to orbit with velocity of 83.24 kilometers per second.[1]
References
- 1 2 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.
External links
- "HD 195019". Exoplanets.
Coordinates: 
20h 28m 18.6363s, +18° 46′ 10.188″
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