Celestia Forums

i discovered this problem when the topic about the bigest star in celestia was posted.
ALL THE STARS IN MY CELESTIA HAVE WRONG SIZE. FOR EXAMPLE, WHAT SHOULD BE ~800Rsun IT;S MORE THAN 8000Rsun. EVERYTHING IS BIGGER.

what can i do???

What size is Sol, our sun?

Grant

i thought that maybe the sun has thw wrong zise.
it has:
Abs mag 4.83
class G2 V
Surface temp 5860.000 k
1.00 RSun.

No, the sun is fine - 1.00RSun means 1x the radius of the sun, which is of course exactly what it should be - I thought so, from my recollections of your post of a transit a week or two ago.
It would be a surprise if Celestia were getting other stars wrong but the sun correct. I seem to recall that the discussion about large stars focused initially on an add-on by Rassilon - is it possible you just have a different version of that add-on, one that has generated unfeasibly large stars and which has since been corrected? Or are there other stars with conventional Hip numbers that you feel are also too large?

Grant

im not talking about add-ons, thats the problem. im talking about, for example Antares, it has 449 RSun.
and there is one that should have 800 and has 8000 in my celestia.

what i said is that maybe the radius of the sun in KM is wrong. the sun compared to the sun has 1Rsun, but maybe in Km it has a smaller radius.

ElPelado wrote:im not talking about add-ons, thats the problem. im talking about, for example Antares, it has 449 RSun.

Hmm, that's about right for Antares - certainly much better than Celestia 1.3.0 tells me - 261.11RSun. You haven't, by any chance, downloaded and compiled a recent revision, have you? Chris has revised the calculation for radii to make it more accurate, and what you're seeing would fit with that.

ElPelado wrote:what i said is that maybe the radius of the sun in KM is wrong. the sun compared to the sun has 1Rsun, but maybe in Km it has a smaller radius.

Looked OK in the recent image you posted. Why don't you look at the annular eclipse due tomorrow - if it's annular then the Sun isn't too small.

Grant

yes the anular eclipse is good. i have already seen it.
i have the 1.3.0 version.
another example is HD 184283. someone said that it has 871.92 Rsun. on my celestia it has 5253.84 RSun!!!!
here are some known stars, tell me if in your celestia they are the same:
STAR------------DIAMETER(RSun)
Polaris--------------40.53
Alnitak--------------12.95
Alnilam-------------19.17
Rigel----------------60.49
Betelgeuse---------508.02
Aldebaran----------32.8
Vega----------------2.81
Rigel Kentaurus A--1.20

ElPelado,

This is what you can do (assuming you're using Windows). If you're using Linux, I can't help ya -- don't know enough about it to even install it.

I'd try uninstalling Celestia. Then after it's uninstalled go to the location where Celestia was installed. If you find a Celestia folder, delete it. Then reinstall Celestia. This way, you'll have a clean installation of Celestia.

BTW, that was me who mentioned HD 184283's size of 871.92 Rsun.

i thought about unistalling. but then i will have to install again all the addons.

All your star radii are different from the ones my Celestia provides, with the exception of Rigel Kent A, which is on the button. There doesn't seem to be any consistency to the error that I can see - Polaris is marginally smaller in your version.
That's a weird one, and I can't think of anything to do but a reinstallation. Not my specialist topic, though ...

Grant

ok, thanks for the help anyway!