Talk:Oph 162225-240515

binary
"about a sixth of brown dwarfs, come in pairs" we're told in the Space.com article, and the paper's abstract says we have here "the discovery of a companion to a young planetary mass brown dwarf". So can someone who knows about this stuff clear up why this is important? :-) Evercat 22:15, 3 August 2006 (UTC)


 * It's important because it defeats the theory that they might've emerged from one bigger star's early stages. And it would be altogether a bad joke to classify two objects as one. Rotten Venetic 11:07, 14 December 2006 (UTC)

name
Also, is "Oph 162225-240515" the name of the pair or just the name of the bigger object? Evercat 22:28, 3 August 2006 (UTC)


 * From the name, it's to be found in Ophiucus. The separation between the two objects may be such that the same coordinate is good for both (16h22m25s RA -24degrees05m15s dec) 132.205.45.148 00:03, 5 August 2006 (UTC)


 * The article in Science lists the secondary as being separated by 1.94" from the primary, at a position angle of 182 degrees (measured east from north, I assume, and thus almost directly south). So the declination is given with more precision than the separation, but they don't clarify more exact absolute coordinates for the two planemos.  I'd guess they more-or-less straddle the originally reported position.


 * But back to the original question, elsewhere I see the names "Oph1622A" and "Oph1622B" so I added that to the article. --NealMcB 21:21, 14 August 2006 (UTC)

orbit
My rough calculations suggest that they would orbit their common barycenter with a period of perhaps 20,000 years, but it is important to take into account the unknown orientation of the axis of rotation. If anyone sees a reference to this sort of analysis, please insert the information and a link. --NealMcB 21:21, 14 August 2006 (UTC)
 * The information isn't known because the eccentricity of the orbit isn't known. WilyD 17:51, 28 November 2006 (UTC)