Celestia Forums

I have been working on my planetary system for Delta Trianguli for months now, and have hit a snag. I have corrected the true characteristics of the two suns, but I can not make the planets show any temperature. I'm sure it has something to do with the fact that they are orbiting the barycenter, but is there a way to go around this? Can I give the barycenter a temperature?

That's a bug in v1.5.1. Have you tried v1.6? I don't recall if it's been fixed yet.

selden wrote:That's a bug in v1.5.1. Have you tried v1.6? I don't recall if it's been fixed yet.

Where can I download v6.1?

It is not yet available officially: bugs are still being squashed. However, an unofficial build for Windows made from Celestia's svn souce code archive on Source Forge is available on cartrite's Web site. It's described in a sticky thread in the Celestia Development Forum.

http://www.celestiaproject.net/forum/viewtopic.php?f=4&t=12221

Binary systems are not taken into account in v1.6 either. Phase angles aren't shown either.

So the temperature thing will be fixed for the next updated version of Celestia? I believe I can be patient for that. But is it or not going to be taken care of?

From what I've been able to tell, this issue is a "won't fix" one for the time being: the Celestia temperature model for planets is fairly dubious anyway (for a start, the albedo property appears to be treated as the Bond albedo, whereas in the renderer it is the visual albedo), even for just the 1 star. I believe Chris has mentioned that he is considering removing the temperature display entirely.

ajtribick wrote:From what I've been able to tell, this issue is a "won't fix" one for the time being: the Celestia temperature model for planets is fairly dubious anyway (for a start, the albedo property appears to be treated as the Bond albedo, whereas in the renderer it is the visual albedo), even for just the 1 star. I believe Chris has mentioned that he is considering removing the temperature display entirely.

This is all correct. I don't feel that the equilibrium temperature (which is actually what is meant by temperature in Celestia) is so useful that it deserves its own line in the object info text. If we show it at all, it belongs somewhere else--perhaps a separate info window.

Some restructuring of the star code in version 1.6.0 does make much easier to calculate phase angles and temperatures in multiple star systems.

--Chris

ajtribick wrote:I believe Chris has mentioned that he is considering removing the temperature display entirely.

OH PLEASE NO!! It is a pretty handy setting for Celestia. In my case, It helps me pin-point the habitable zone around a specific star. We should expand on it, not remove it.

NuclearVacuum wrote:

ajtribick wrote:I believe Chris has mentioned that he is considering removing the temperature display entirely.

OH PLEASE NO!! It is a pretty handy setting for Celestia. In my case, It helps me pin-point the habitable zone around a specific star. We should expand on it, not remove it.

In Celestia we tend to keep only displays that have a scientific basis and are known to be decent approximations THROUGHOUT. Otherwise one cannot rely on the output, which can be much worse than not having such a display at all.

Fridger