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Extrasolar planets around HD 196050, HD 216437 and HD 160691
We report precise Doppler measurements of the stars HD 216437, HD 196050and HD 160691 obtained with the Anglo-Australian Telescope using theUCLES spectrometer together with an iodine cell as part of theAnglo-Australian Planet Search. Our measurements reveal periodicKeplerian velocity variations that we interpret as evidence for planetsin orbit around these solar type stars. HD 216437 has a period of 1294+/- 250 d, a semi-amplitude of 38 +/- 3 m s-1 and aneccentricity of 0.33 +/- 0.09. The minimum (M sin i) mass of thecompanion is 2.1 +/- 0.3 MJUP and the semi-major axis is 2.4+/- 0.5 au. HD 196050 has a period of 1300 +/- 230 d, a semi-amplitudeof 49 +/- 8 m s-1 and an eccentricity of 0.19 +/- 0.09. Theminimum mass of the companion is 2.8 +/- 0.5 MJUP and thesemi-major axis is 2.4 +/- 0.5 au. We also report further observationsof the metal-rich planet bearing star HD 160691. Our new solutionconfirms the previously reported planet and shows a trend indicating asecond, longer-period companion. These discoveries add to the growingnumbers of mildly eccentric, long-period extrasolar planets aroundmetal-rich Sun-like stars.
| Positions of 100 southern bright circumpolar stars
Abstract image available at:http://adsabs.harvard.edu/abs/1981A&AS...44..151H
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Osservazione e dati astrometrici
| Costellazione: | Centauro |
| Ascensione retta: | 13h56m58.40s |
| Declinazione: | -41°53'26.2" |
| Magnitudine apparente: | 8.519 |
| Distanza: | 609.756 parsec |
| Moto proprio RA: | -20.9 |
| Moto proprio Dec: | 2.5 |
| B-T magnitude: | 9.879 |
| V-T magnitude: | 8.632 |
Cataloghi e designazioni:
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