BD +20°307 [SEP] constellation
BD +20°307
BD +20°307 is a close binary star system approximately 300 light-years away in the constellation Aries. The system is surrounded by a dusty ring.
The dust that orbits around several hundred main-sequence stars is cold and comes from a Kuiper-belt analogous region. In the Solar System the ongoing collisions between asteroids generate a tenuous cloud of dust known as the zodiacal light. When the Solar System was young such collisions were more common and the rate of dust production was probably many
HD 240210 b
HD 240210 b is a 6.9 Jupiter-mass exoplanet discovered on June 10, 2009 by Niedzielski et al. using the Hobby-Eberly Telescope. It orbits the K3 giant star HD 240210 in the constellation of Cassiopeia. Its average orbital separation is at 1.33 Astronomical Units away from its star with a year of 501.75 days.
See also.
- BD+14°4559 b
- BD+20°2457 b
- BD+20°2457 c
- HD 240210