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Color index for some stars is wrong #364

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alex-w opened this issue Sep 19, 2018 · 2 comments · Fixed by #3992
Closed

Color index for some stars is wrong #364

alex-w opened this issue Sep 19, 2018 · 2 comments · Fixed by #3992
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bug Something likely wrong in the code data Missing/bad/outdated data, but no code error importance: low Small problem, rarely visible, no crash state: confirmed A developer can reproduce the issue state: in progress The problem is in process of solution...
Milestone
25.1

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@alex-w
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alex-w commented Sep 19, 2018

Original report by Nick Fedoseev: https://bugs.launchpad.net/stellarium/+bug/1405467

Color index for some stars is wrong, they usually look too red.
Actual index of the selected star at the picture is about ~1.5, while 3.50 is shown.

Perhaps, this can be useful: such extreme index value corresponds to integer value of 127 before conversion (maximum allowed for the field in the data structure)
@alex-w alex-w added bug Something likely wrong in the code state: confirmed A developer can reproduce the issue importance: low Small problem, rarely visible, no crash labels Sep 19, 2018
@gzotti gzotti added the data Missing/bad/outdated data, but no code error label Sep 27, 2018
@gzotti
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gzotti commented Sep 27, 2018

(fixed in original discussion? -- No!)
That one star is no longer shown. But there is one suspicious nearby

mag: 13.45
Color index (B-V): 3.41
RA/Decl (J2000.0):3h45m49.61s/+24°25'35.8"

B-V>3 is very suspicious, generally, so this may even be a code/catalog design bug!

@alex-w
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alex-w commented Jun 30, 2019

Some additional info: https://stargazerslounge.com/topic/337028-stellarium-v0191/ and https://stargazerslounge.com/topic/336251-accuracy-of-color-index-in-stellarium/

@gzotti gzotti mentioned this issue Dec 21, 2019
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@alex-w alex-w mentioned this issue Nov 30, 2024
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@alex-w alex-w added this to the 25.1 milestone Dec 11, 2024
@alex-w alex-w added the state: in progress The problem is in process of solution... label Dec 11, 2024
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Labels
bug Something likely wrong in the code data Missing/bad/outdated data, but no code error importance: low Small problem, rarely visible, no crash state: confirmed A developer can reproduce the issue state: in progress The problem is in process of solution...
Milestone
25.1
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New star catalog with Gaia DR3 henrysky/stellarium
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@alex-w @gzotti