HD 195019 b
Extrasolar planet List of extrasolar planets
Parent star

<tr> <td colspan="2">Star</td> <td>HD 195019</td></tr><tr> <td colspan="2">Constellation</td> <td>Delphinus</td></tr><tr> <td>Right ascension</td> <td style="text-align: center">(α)</td> <td>20h 28m 18.6363s</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>+18° 46′ 10.188″</td></tr><tr><td colspan="2">Distance</td><td>65 ly
(20 pc)</td></tr><tr><td colspan="2">Spectral type</td> <td>G3IV-V</td></tr>

Orbital elements

<tr><td>Semimajor axis</td><td style="text-align: center">(a)</td> <td>0.1388 ± 0.008 AU
(20.76 Gm)</td></tr><tr> <td>Periastron</td> <td style="text-align: center">(q)</td> <td>0.1369 AU
(20.48 Gm)</td></tr><tr> <td>Apastron</td> <td style="text-align: center">(Q)</td> <td>0.1407 AU
(21.05 Gm)</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0.014 ± 0.0044</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>18.20163 ± 0.0004 d
(0.4983248 y)</td></tr><tr> <td>Orbital speed</td> <td style="text-align: center">(υ)</td> <td>83.24 km/s</td></tr><tr> <td>Argument of
</td> <td style="text-align: center">(ω)</td> <td>322 ± 20°</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>2,411,015 ± 1.2 JD</td></tr><tr> <td>Semi-amplitude</td> <td style="text-align: center">(K)</td> <td>272.3 ±1.4 m/s</td></tr>

Physical characteristics

<tr><td>Minimum mass</td><td style="text-align: center">(m sin i)</td><td>3.7 MJ
(1200 M)</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>1998</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>Fischer et al.[1]</td></tr><tr> <td colspan="2">Discovery method</td> <td>Radial Velocity</td></tr><tr> <td colspan="2">Discovery site</td> <td>Lick Observatory</td></tr><tr> <td colspan="2">Discovery status</td> <td>Published[1]</td></tr> <tr style="background-color: #A0B0FF;"><td align=center colspan=3>Database references</td></tr><tr valign=baseline><td colspan=2>Extrasolar Planets
</td><td>data</td></tr><tr><td colspan=2>SIMBAD</td><td>data</td></tr>

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]


  1. 1.0 1.1 1.2 (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.

External links Edit

Coordinates: Sky map 20h 28m 18.6363s, +18° 46′ 10.188″

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