HD 69830

HD 69830 is a star located in the Constellation of the Poupe. It has three planets having roughly the mass of Neptune, inside a disc of dust detected by the Space telescope Spitzer via an excess of radiation Infrarouge.

The star

HD 69830, located at the northern limit of the constellation of the Poop, is a star belonging to the principal sequence of the Diagramme of Hertzsprung-Russell rather similar to the Sun. Of Standard spectral K0V, its mass is estimated at 0,8 solar Masse, with a temperature of surface of 5150 K and a luminosity of 0,45 times that of the Sun.

Disc of dust

Observations carried out in 2005 in the infra-red range by the Space telescope Spitzer have made it possible to detect a disc of dust around HD 69830 ! Mass (M_T) ! Equatorial radius (ua) ! orbital Period (days) ! eccentricity |- | B | 0,033 | 10,5 | 0,0785 | 8,667 ± 0,003 | 0,1 ± 0,04 |- | C | 0,038 | 12,1 | 0,186 | 31,56 ± 0,04 | 0,13 ± 0,06 |- | D | 0,058 | 18,4 | 0,63 | 197 ± 3 | 0,07 ± 0,07 |}

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