HD 20367 b
Extrasolar planet List of extrasolar planets
Parent star

<tr> <td colspan="2">Star</td> <td>HD 20367</td></tr><tr> <td colspan="2">Constellation</td> <td>Aries</td></tr><tr> <td>Right ascension</td> <td style="text-align: center">(α)</td> <td>03h 17m 40.0461s[1]</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>+31° 07′ 37.372″[1]</td></tr><tr><td colspan="2">Distance</td><td>88 ± 3 ly
(27.1 ± 0.8 pc)</td></tr><tr><td colspan="2">Spectral type</td> <td>G0[1]</td></tr>

Orbital elements

<tr><td>Semimajor axis</td><td style="text-align: center">(a)</td> <td>1.246 ± 0.075[2] AU</td></tr><tr> <td>Periastron</td> <td style="text-align: center">(q)</td> <td>0.847 AU</td></tr><tr> <td>Apastron</td> <td style="text-align: center">(Q)</td> <td>1.645 AU</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0.320 ± 0.090[2]</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>469.5 ± 9.3[2] d
(1.29 y)</td></tr><tr> <td>Argument of
</td> <td style="text-align: center">(ω)</td> <td>135 ± 16[2]°</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>2,451,860 ± 18[2] JD</td></tr><tr> <td>Semi-amplitude</td> <td style="text-align: center">(K)</td> <td>29.0 ± 3.0[2] m/s</td></tr>

Physical characteristics

<tr><td>Mass</td><td style="text-align: center">(m)</td><td>>1.17 ± 0.23[2] MJ
(>370 ± 70 M)</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>June 2002</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>Udry, Mayor, Queloz</td></tr><tr> <td colspan="2">Discovery method</td> <td>radial velocity</td></tr><tr> <td colspan="2">Discovery site</td> <td>Haute-Provence Observatory,
Template:Country data France</td></tr><tr> <td colspan="2">Discovery status</td> <td>Announced[3][4]</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 20367 b is an extrasolar planet approximately 88 light years away in the constellation of Aries. It has mass similar to that of Jupiter. It orbits the star at a mean distance that is a quarter farther than Earth orbits from the Sun. The 470-day (1.3 year) orbit is somewhat eccentric.


  1. 1.0 1.1 1.2 HD 20367 -- Star, database entry, SIMBAD. Accessed on line October 1, 2008.
  2. 2.0 2.1 2.2 2.3 2.4 2.5 2.6 Table 3, Catalog of Nearby Exoplanets, R. P. Butler et al., The Astrophysical Journal 646, #1 (July 2006), pp. 505–522, Template:Bibcode, Template:Doi.
  3. Table 1, The ELODIE survey for northern extra-solar planets. I. Six new extra-solar planet candidates, C. Perrier, J.-P. Sivan, D. Naef, J. L. Beuzit, M. Mayor, D. Queloz, S. Udry, Astronomy and Astrophysics 410 (November 2003), pp. 1039–1049, Template:Bibcode, Template:Doi.
  4. A 1.1 Jupiter-mass planet orbiting HD 20367, Geneva Observatory, October 7, 2002. Accessed on line October 1, 2008.

External linksEdit

Coordinates: Sky map 03h 17m 40.0461s, +31° 07′ 37.372″

de:HD 20367 b

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