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HD 4203 b
Extrasolar planet List of extrasolar planets
Parent star

<tr> <td colspan="2">Star</td> <td>HD 4203</td></tr><tr> <td colspan="2">Constellation</td> <td>Pisces</td></tr><tr> <td>Right ascension</td> <td style="text-align: center">(α)</td> <td>00h 44m 41.20s[1]</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>+20° 26′ 56.1″[1]</td></tr><tr><td colspan="2">Distance</td><td>250 ± 20[1] ly
(77 ± 6[1] pc)</td></tr><tr><td colspan="2">Spectral type</td> <td>G5</td></tr>

Orbital elements

<tr><td>Semimajor axis</td><td style="text-align: center">(a)</td> <td>2.07 ± 0.13 AU</td></tr><tr> <td>Periastron</td> <td style="text-align: center">(q)</td> <td>0.996 AU</td></tr><tr> <td>Apastron</td> <td style="text-align: center">(Q)</td> <td>3.14 AU</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0.519 ± 0.027</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>431.88 ± 0.85 d
(1.1824 y)</td></tr><tr> <td>Orbital speed</td> <td style="text-align: center">(υ)</td> <td>52.3 km/s</td></tr><tr> <td>Argument of
periastron
</td> <td style="text-align: center">(ω)</td> <td>329.1 ± 3.1°</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>2,451,918.9 ± 2.7 JD</td></tr><tr> <td>Semi-amplitude</td> <td style="text-align: center">(K)</td> <td>60.3 ± 2.2 m/s</td></tr>

Physical characteristics

<tr><td>Mass</td><td style="text-align: center">(m)</td><td>>1.16 MJ
(>369 M)</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>15 October 2001</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>Vogt et al.</td></tr><tr> <td colspan="2">Discovery method</td> <td>radial velocity</td></tr><tr> <td colspan="2">Discovery site</td> <td>Keck telescope</td></tr><tr> <td colspan="2">Discovery status</td> <td>Published[2]</td></tr>

Other designations
HIP 3502 b

<tr style="background-color: #A0B0FF;"><td align=center colspan=3>Database references</td></tr><tr valign=baseline><td colspan=2>Extrasolar Planets
Encyclopaedia
</td><td>data</td></tr><tr><td colspan=2>SIMBAD</td><td>data</td></tr>

HD 4203 b is an exoplanet more massive than Jupiter. It orbits two times further from the star than Earth to the Sun. The planet takes 1.1824 year to orbit the star very eccentrically from 1.00 AU to 3.14 AU. The planet was discovered by Steve Vogt using the Keck telescope.[2][3]

See also Edit

ReferencesEdit

  1. 1.0 1.1 1.2 1.3 (2007). Validation of the new Hipparcos reduction. Astronomy and Astrophysics 474 (2): 653–664. Vizier catalog entry
  2. 2.0 2.1 (2002). Ten Low-Mass Companions from the Keck Precision Velocity Survey. The Astrophysical Journal 568 (1): 352–362.
  3. (2006). Catalog of Nearby Exoplanets. The Astrophysical Journal 646 (1): 505–522.

External links Edit

Coordinates: Sky map 00h 44m 41.2021s, +20° 26′ 56.138″


de:HD 4203 b

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