| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| 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 | ||
| Semimajor 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. | |
| Detection method | Radial Velocity | |
| Discovery site | Lick Observatory | |
| Discovery status | Published | |
| Database references | ||
| Extrasolar Planets Encyclopaedia |
data | |
| SIMBAD | 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.