MonsterStar

Commander David · Post #1by **Commander David** » 07.09.2002, 06:01

Hi everybody,

yesterday i`ve downloaded the new Star.dat from Rigel and i found a monster Star. The Star is very far away from our sun. ?maybe the farest?
I`ve made a snapshot from it here. This Star is 127 times biger then our Sun. Is this a bug?

jrobert · Post #2by **jrobert** » 07.09.2002, 09:04

Commander David wrote:Hi everybody,

yesterday i`ve downloaded the new Star.dat from Rigel and i found a monster Star. The Star is very far away from our sun. ?maybe the farest?
I`ve made a snapshot from it here. This Star is 127 times biger then our Sun. Is this a bug?

First of all, that'd be 126963.26 times as big as our sun and second, I think it's a bug since being no star can possibly be that big as we know it. The largest star I've found in the starDB that ships with Celestia is HD 184283 at 871.92 Rsun. Mind you, that's 871 times bigger not 871/1000ths the size of our sun.

Redfish · Post #3by **Redfish** » 08.09.2002, 20:06

I wasn't able to find the HD 1013 etc you specified, so i could not check it.
The other star HD 184283 only has a size of +/- 400 Rsuns. Don't know where you got the 800.

It is of course a bug. A star of that size would never be able to hold it's size, or compensate for the huge gravitational forces inside it.

This sun is probably a miscalculation from the Tyc database.

Post #4by **selden** » 09.09.2002, 10:35

HD 184283 / HIP 96255 as supplied in v1.2 of the stars database that Pascal has provided is specified as 871.92 Rsun.

A minor technical glitch, I'm sure

Redfish · Post #5by **Redfish** » 09.09.2002, 21:13

Ah, i hadn't installed that db yet.

Rigel · Post #6by **Rigel** » 12.09.2002, 16:11

HIP 96255 is a star with a parallax of 0.00021" ---> 15532 ly according to the Hipparcos catalog. But the error on this parallax is : 0.00092 "

Thus the star should be at least at 2885 ly from Sun.

No luminosity class is given for the star, so the data base builder of Celestia assume it is a dwarf of class V...

I have to improve the correction procedure for Hipparcos stars with strange values :wink:

Pascal