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HD 102272 c
Extrasolar planet List of extrasolar planets
Parent star

<tr> <td colspan="2">Star</td> <td>HD 102272</td></tr><tr> <td colspan="2">Constellation</td> <td>Leo</td></tr><tr> <td>Right ascension</td> <td style="text-align: center">(α)</td> <td>11h 46m 23.5351s[1]</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>+14° 07′ 26.350″[1]</td></tr><tr> <td>Apparent magnitude</td> <td style="text-align: center">(mV)</td> <td>8.71[1]</td></tr><tr><td colspan="2">Distance</td><td>1200±300 ly
(360±90[2] pc)</td></tr><tr><td colspan="2">Spectral type</td> <td>K0[3]</td></tr>

Orbital elements

<tr><td>Semimajor axis</td><td style="text-align: center">(a)</td> <td>1.57 ± 0.05[3] AU</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0.68 ± 0.06[3]</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>520 ± 26[3] d</td></tr><tr> <td>Argument of
periastron
</td> <td style="text-align: center">(ω)</td> <td>320 ± 10[3]°</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>2454135 ± 260[3] JD</td></tr><tr> <td>Semi-amplitude</td> <td style="text-align: center">(K)</td> <td>59 ± 11[3] m/s</td></tr>

Physical characteristics

<tr><td>Mass</td><td style="text-align: center">(m)</td><td>>2.6 ± 0.4[3] MJ</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>18 June 2008</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>Niedzielski et al.</td></tr><tr> <td colspan="2">Discovery method</td> <td>Radial velocity</td></tr><tr> <td colspan="2">Discovery site</td> <td>McDonald Observatory, USA</td></tr><tr> <td colspan="2">Discovery status</td> <td>Published[3]</td></tr>

HD 102272 c is an extrasolar planet approximately 1,200 light-years away in the constellation of Leo. The planet is orbiting the K-type giant star HD 102272. The planet was discovered by the radial velocity method, using the Hobby-Eberly Telescope. Another planet, HD 102272 b, was also discovered orbiting the same star. Although there is evidence for the existence of this planet, data is insufficient to unambiguously determine its orbit. The discovery was announced in June 2008. It's thought to have at least 2.6 times the mass of Jupiter.[3]

See also Edit

References Edit

  1. 1.0 1.1 1.2 HD 102272, entry, SIMBAD. Accessed on line June 18, 2008.
  2. Notes for star HD 102272. The Extrasolar Planets Encyclopaedia. Retrieved 2008-07-01.
  3. 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 (2009). A Planet in a 0.6 AU Orbit Around the K0 Giant HD 102272. The Astrophysical Journal 693 (1): 276–280.

External links Edit

Coordinates: Sky map 11h 46m 23.5351s, +14° 07′ 26.350″


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