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IDProjectCategoryView StatusLast Update
0001320SkyChart2-Catalog datapublic24-08-22 16:00
Reportertestcy Assigned ToPatrick Chevalley  
PrioritynormalSeverityfeatureReproducibilityalways
Status assignedResolutionopen 
Platformx86_64OSWindowsOS Version7
Product Version3.10 
Target Version4.4 
Summary0001320: Greek star letters in catalogs
DescriptionI have noticed that with Extended Hipparcos catalog checked the stars are labeled with greek alphabet letters starting with a capital letter for example Bet Peg. But when checking also Gen. Cat. Variable Stars the variable stars are labeled with greek alphabet letters starting with a small letter for example alf And. Is there a way to have all stars labeled in a similar way when using these catalogs?
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Patrick Chevalley

14-04-27 18:52

administrator   ~0002863

This is a bit difficult because the GCVS use a variety of different names and CdC as multiple options to show the labels.

By default the label is show for both the star and the variable star, so beta peg as two labels, the greek letter beta from xhip and "bet Peg" from gcvs, I agree we can remove the second.
But "71 Peg" from xhip is also labeled "HW Peg" from GCVS, in this case it may be important to keep both.

An immediate solution to avoid the double label is to disable the "variable star" label from Setup/Display/Labels.

And what I can change in the program is to not display the GCVS label if all of this conditions are respected:
- Labels are set to show the short name.
- XHIP catalog is active and the "star" label is active.
- Option "Display labels for all star catalog" in unchecked.
- the GCVS name is three lowercase letter followed by a constellation name.



John B

24-08-22 16:00

reporter   ~0009043

Another solution is to delete the Bayer designations from the GCVS, then re-build it as a catalogue of deep-sky objects (circles) and display them on top of the main star catalogue. This keeps both labels (see 71 Peg = HW Peg image att.) but avoids the double label for Bayer stars such as bet Peg.

But I haven't been able to display Bayer letters in other custom star catalogues -- other stars display but Bayer stars and their labels are not visible on the chart. Here are the fields in my CatGen record:

RA decimal (degrees): Label RA, First char 1, Length 12
DEC decimal (degrees): Label DEC, First char 14, Length 12
Catalog ID: Label Id, First char 73, Length 7 (* Bayer or Flamsteed label to be displayed, if it exists *)
Magnitude (mag): Label mV, First char 97, Length 5
B-V (mag): Label B-V, First char 118, Length 6
Magnitude B (mag): Label BT, First char 104, Length 6
Proper motion RA (arcsec/yr): Label pmRA, First char 81, Length 7
Proper motion DEC (arcsec/yr): Label pmDE, First char 89, Length 7
String 1: Label Ref, First char 27, Length 16 (* reference catalogue *)
String 2: Label Bayer, First char 44, Length 11
String 3: Label Flamsteed, First char 55, Length 7

What are the CatGen fields in your HIP build that displays Greek letters correctly?

-- JB
71_Peg.JPG (11,166 bytes)   
71_Peg.JPG (11,166 bytes)   

Issue History

Date Modified Username Field Change
14-04-24 19:50 testcy New Issue
14-04-27 18:52 Patrick Chevalley Note Added: 0002863
14-04-27 18:52 Patrick Chevalley Assigned To => Patrick Chevalley
14-04-27 18:52 Patrick Chevalley Status new => assigned
14-04-27 18:52 Patrick Chevalley Target Version 0.3.0 => 4.0
15-04-01 11:00 Patrick Chevalley Severity minor => feature
15-04-01 11:00 Patrick Chevalley Target Version 4.0 => 4.2
17-10-21 20:28 Patrick Chevalley Target Version 4.2 => 4.4
24-08-22 16:00 John B Note Added: 0009043
24-08-22 16:00 John B File Added: 71_Peg.JPG