Celestia Forums

Celestia is a great program, but why I cannot fing any nearby recently discovered BDs and planemos, like OTS 44, Cha 110913-773444 , or ULAS J0034-00 ( http://www.gemini.edu/index.php?option= ... iew&id=232 )?
Are you planning to add them in the next distribution or are there any addons that will add them?[/url]

Please remember that Celestia is a 3D program. I may have overlooked it, but I can't find any indication of the distance to the BD in the article that you reference.

Some of the others do seem to have relatively well measured distances, though.

You probably should consider creating a well documented Addon yourself and making it available.

http://en.wikipedia.org/wiki/OTS_44
550 ly away

http://en.wikipedia.org/wiki/Cha_110913-773444
163 ly away

m1omg wrote:http://en.wikipedia.org/wiki/OTS_44
550 ly away

http://en.wikipedia.org/wiki/Cha_110913-773444
163 ly away

We usually do NOT take over ANONYMOUS data entries from Wikipedia into Celestia!

There seems little background information available about the methods used to get those numbers and the associated uncertainties. Websites including NASA present distances ranging between 50pc (163 ly) and 500 ly for Cha_110913-773444.
Here is the discovery paper of Cha_110913-773444.
http://www.journals.uchicago.edu/ApJ/jo ... 20043.html

NASA(spitzer) wrote:http://www.nasa.gov/vision/universe/sta ... 51129.html
The teeny brown dwarf is young at 2 million years old, and lives 500 light-years away in the Chamaeleon constellation.

Another Website with d= 500ly for Cha_110913-773444
http://jumk.de/astronomie/exoplanets/ch ... 3444.shtml

Your Wiki reference gives ~50pc = 163 ly for the same object.

Since you quote just two "bare" numbers, which must look uncritical to many, I am sure you know MUCH more about them...

Please share your deep knowledge...

As long as we do not have published scientific sources available on these distances, such data will not appear as parts of Celestia's data base.

Bye Fridger

With regard to that link and ULAS J0034-00...

... precisely determining J0034?€™s distance accurately by using its apparent motion due to parallax as the Earth moves in its orbit?€“will have to wait for a year or so. ...

Appears it will be a while.