I've just discovered Celestia (wow!) and am trying to add some textures for an educational application. But there's apparently something wrong with my SSC file. Could someone spare me some brain cells to point me toward the meaning of the terms in the following lines of the error message, returned as the result of using the ~ key?
Error in .ssc file (line 198): parent body 'TYC 5503-946-1' of 'b' not found.
Error in .ssc file (line 932): parent body 'BD-02 5917 B' of 'b' not found.
What is "parent body"?
What is "of 'b'"?
Does the line number refer to the SSC file line number, or something else?
Sincere thanks for any tips or clues or FAQ references! What an incredibly exciting set of software!
Can you translate this error message?
Those error messages are referring to one of the ssc catalog files included with Celestia, not to anything that you've done wrong.
The file Celestia/data/extrasolar.ssc lists all of the planets known to orbit other stars. Even stars that aren't included in Celestia's star catalog. So Celestia complains that some of those planets' "parent bodies" -- the stars that they orbit -- can't be found in Celestial's lists of stars. The line number does refer to the line within that SSC catalog file.
"b" is the standard astronomical notation for the second body in a stellar system. I don't think anyone has actually given names to any of the extrasolar planets. So they just get this anonymous label.
So far as I know, all of the extra-solar planets that have been found have been orbiting solitary stars, not stars that are members of multiple star systems. As a result, the first planet in a particuar stellar system is the second body of that system -- and thus gets the label "b". In a multiple-star system, the individual stars already would have been labelled a, b, c, etc.
Does this help?
The file Celestia/data/extrasolar.ssc lists all of the planets known to orbit other stars. Even stars that aren't included in Celestia's star catalog. So Celestia complains that some of those planets' "parent bodies" -- the stars that they orbit -- can't be found in Celestial's lists of stars. The line number does refer to the line within that SSC catalog file.
"b" is the standard astronomical notation for the second body in a stellar system. I don't think anyone has actually given names to any of the extrasolar planets. So they just get this anonymous label.
So far as I know, all of the extra-solar planets that have been found have been orbiting solitary stars, not stars that are members of multiple star systems. As a result, the first planet in a particuar stellar system is the second body of that system -- and thus gets the label "b". In a multiple-star system, the individual stars already would have been labelled a, b, c, etc.
Does this help?
Selden
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granthutchison
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selden wrote:So far as I know, all of the extra-solar planets that have been found have been orbiting solitary stars, not stars that are members of multiple star systems
BD-02 5917 B, which started this thread, is a counterexample. The strategy seems to be to give stellar objects a capital letter and substellar objects a lower case letter - thus BD-02 5917 Bb, the first-discovered substellar companion of BD-02 5917 B.
Grant