Planets in the Praesepe Cluster

Two 'b's in the Beehive: The Discovery of the First Hot Jupiters in an Open Cluster
http://arxiv.org/abs/1207.0818

Quote :

We present the discovery of two giant planets orbiting stars in Praesepe (also known as the Beehive Cluster), the first known hot Jupiters in an open cluster. Pr0201b orbits a V=10.52 late F dwarf with a period of 4.4264 +/- 0.0070 days and has a minimum mass of 0.540 +/- 0.039 Mjup, and Pr0211b orbits a V=12.06 late G dwarf with a period of 2.1451 +/- 0.0012 days and has a minimum mass of 1.844 +/- 0.064 Mjup. Because they reside in a cluster, the ages of these planets are amongst the best-determined of any planet outside our own solar system. As we endeavor to learn more about the frequency and characteristics of planets, the environment in which most stars form -- open clusters like Praesepe -- may provide essential clues to this end. This discovery will allow, for the first time, a direct estimate of the short-period giant planet frequency in open clusters.

Nice, these join Epsilon Tauri, BD-13°2130 and TYC 8975-2606-1 as some of the few known planet hosts in open clusters. First cluster with two known planets.

Press Release
First Planets Found Around Sun-Like Stars in a Cluster

Feels like the good-ole days, with hot Jupiters making ample material for press releases

Sirius_Alpha wrote:

Feels like the good-ole days, with hot Jupiters making ample material for press releases

Party like it's 1995...

WHOO-HOOOOO!!!

-M-

But can you imagine the night skies there?

Sunchaser wrote:

But can you imagine the night skies there?

Lots of light pollution from glowing winds from the dayside

A second, long-period giant planet around Pr0211.

The GAPS programme with HARPS-N at TNG XI. Pr~0211 in M~44: the first multi-planet system in an open cluster
http://arxiv.org/abs/1602.00009

Finally Pr 0211 c is listed at EPE:

http://exoplanet.eu/catalog/pr_0211_c/

Anyway might anyone notify EPE webmaster that four double entries are hindering actual exoplanet count there? Pr 0211 b, HD 4732 b & c and KOI-2828 b are listed twice.

Personally I think it more worthwhile to try and improve the Open Exoplanet Catalogue...