HD 23079 b
Extrasolar planet List of extrasolar planets
Parent star

<tr> <td colspan="2">Star</td> <td>HD 23079</td></tr><tr> <td colspan="2">Constellation</td> <td>Reticulum</td></tr><tr> <td>Right ascension</td> <td style="text-align: center">(α)</td> <td>03h 39m 43.0952s</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>−52° 54′ 57.017″</td></tr><tr> <td>Apparent magnitude</td> <td style="text-align: center">(mV)</td> <td>7.1</td></tr><tr><td colspan="2">Distance</td><td>113.5 ly
(34.8 pc)</td></tr><tr><td colspan="2">Spectral type</td> <td>F8/G0V</td></tr>

Orbital elements

<tr><td>Semimajor axis</td><td style="text-align: center">(a)</td> <td>1.60 ± 0.12 AU
(239 Gm)</td></tr><tr> <td>Periastron</td> <td style="text-align: center">(q)</td> <td>1.44 AU
(215 Gm)</td></tr><tr> <td>Apastron</td> <td style="text-align: center">(Q)</td> <td>1.76 AU
(263 Gm)</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0.102 ± 0.031</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>730.6 ± 5.7 d
(2.000 y)</td></tr><tr> <td>Argument of
</td> <td style="text-align: center">(ω)</td> <td>55 ± 17°</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>2,450,492 ± 37 JD</td></tr><tr> <td>Semi-amplitude</td> <td style="text-align: center">(K)</td> <td>54.9 ± 1.1 m/s</td></tr>

Physical characteristics

<tr><td>Minimum mass</td><td style="text-align: center">(m sin i)</td><td>2.45 ± 0.16 MJ</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>October 2001</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>Tinney et al.</td></tr><tr> <td colspan="2">Discovery method</td> <td>doppler spectroscopy</td></tr><tr> <td colspan="2">Discovery site</td> <td>Template:Country data Australia Anglo-Australian Observatory</td></tr><tr> <td colspan="2">Discovery status</td> <td>Published</td></tr>

HD 23079 b is an exoplanet approximately 114 light years away in the constellation Reticulum. The planet has mass of at least 2.45 Jupiters, although only the minimum mass is known since inclination is unknown. The planet takes almost exactly two years to orbit the star at the average distance of 1.6 AU. The planet's orbital eccentricity is about the same as 109 Piscium b, HD 75898 b, and HD 69830 b at 0.102. The distance range from as close as 1.44 AU to as far away as 1.76 AU from the parent star.

The planet was discovered in 2001 by Tinney et al., who used doppler spectrometer to look for shifts of star’s spectrum caused by a gravity of the planet tug the star around as the planet orbits.

References Edit

  • Dvorak, R.; Pilat-Lohinger, E.; Schwarz, R.; Freistetter, F. (2004). Extrasolar Trojan planets close to habitable zones. Astronomy & Astrophysics 426 (2): L37.

External links Edit

Coordinates: Sky map 03h 39m 43.0952s, −52° 54′ 57.017″

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