Celestia Forums

First off, I just heard about and d/l'd Celestia two days ago and I can't get enough! Thank you Chris and everyone else out there making all the great models, textures, .ssc files, etc.
I was just curious if anyone is working on a new .ssc file describing Ogle-TR-56b's orbit around it's star (which I can't seem to find the name of...) I'd love to see that fast orbit. I'd like to do it myself but at this point in time my edumacation level just isn't up to it... Is the info out there yet or are we still waiting for the paper to be published?
Pretty exciting stuff!

BD

briandelancey wrote:First off, I just heard about and d/l'd Celestia two days ago and I can't get enough! Thank you Chris and everyone else out there making all the great models, textures, .ssc files, etc.
I was just curious if anyone is working on a new .ssc file describing Ogle-TR-56b's orbit around it's star (which I can't seem to find the name of...) I'd love to see that fast orbit. I'd like to do it myself but at this point in time my edumacation level just isn't up to it... Is the info out there yet or are we still waiting for the paper to be published?
Pretty exciting stuff!

It is exciting stuff . . . Unfortunately, there are some limitations in Celestia that make it impossible to add planets found by the Ogle survey. The planets found by the radial velocity method orbit stars that are relatively near to the Sun, as this technique only works with brighter stars. The transit method can work well with fainter stars too, and Ogle-TR-56 is about 50,000 light years away. It's unlikely this star will be in either the Hipparcos or Tycho catalogs that Celestia uses. While it is possible to add additional stars, there are restrictions on how far from the Sun the new stars may be. I've thought of some workarounds, but you'll have to wait until a future version of Celestia for them.

--Chris

Actually, the star is "only" 5000 ly away, and should be within grasp for Celestia. Although I don't know if there's much sense in adding it, being that far from the main stellar database (and its visual magnitude, as seen from Earth, is merely V=16.6!). Read all about the discovery, as told by the researchers themselves, here.

I noticed that the AAS meeting this year is in Seattle, the capital of Celestia! There should be plenty of opportunity for you to sneak in there, Chris and Brian, if only to at the posters. But maybe this is a different Seattle?

/Alexis

The coordinates of star ogle tr 56 are:
Right Ascension : 17° 56' 35.5"
Declination: -29° 32' 21.2"
radius :about 0.8 Sol
distance : about 5000 ly

See the page at:

http://www.extrasolar.net/star.asp?starid=191

ciao at all

Bruno

Why would want to add a planet that has been disproven to exsist. Its fine to add it if its for a sci-fi add-on but for reality it seems that this planet is a lost cause.

Don,

Can you provide a reference for it being "disproven to exist"?

The only mention I've found is 2nd hand and says that it was "disproven to be a planet", which is not quite the same -- they could have decided it's a brown-dwarf, for example.

I think Don refers to the web page provided by Bruno above, which states that this eclipsing planet candidate has been ruled out as being a planet ("disproven"). In fact, most of the 40 planet candidates found in this way have turned out to be binary stars, but not OGLE-TR-56 b, so the web page is in error / not updated. For first-hand information, I again refer to the story by the researchers themselves. There is also an entry in the Extrasolar Planets Encyclopaedia; find it here.

/Alexis

In effects the web page above was up-to-date at 30/10/02 and after I having read the preprint of the authors I have realized that something didn't return…
Bruno

was I before

Acording to the magizne Science News vol. 163 NO. 3 pg.38 (January
18, 2003) this object is a planet (proven with spectra from Keck I)

The article claims planet has 90% the mass of Jupiter and 1.3 times it's radius and orbits its parent star in 29 hours.

http://www.sciencenews.org