emamajek on 01-Feb-2025 08:06:12 GMT about * sig Ser
sig Ser: The current default spectral type (A9Ib/II
1999MSS...C05....0H
) classifying the star as a supergiant is very discrepant with other published types, the star's CMD position, and spectroscopic gravity estimates. Published gravities (logg=4.01(GaiaDR3), logg=4.11(2003A&A...398.1121E) and logg=4.15(2016A&A...587A...2B) are all consistent with subgiant or dwarf luminosity class, not supergiant. The absolute magnitude (M_G=2.43;GaiaDR3) and radius (1.94Rsun;GaiaDR3, 1.814Rsun;2019AJ....158..138S) are also consistent with either dwarf or subgiant status.
More recent spectral types:
F1IV
1995ApJS...99..135A
F1IV-V
1989ApJS...69..301G
F1IV-V
1989AJ.....98.1049G
I recommend adopting the Gray/Garrison type (from their spectral survey of early F stars) as default:
F1IV-V
1989ApJS...69..301G
Some default photometry could be added to its file (either from ASCC-2.5 or from Cousins, as it was a UBV photometric standard star):
U 5.18 ~
1971ROAn....7....1C
B 5.15 0.011
1971ROAn....7....1C
B 5.172 0.004
2001KFNT...17e.409K
V 4.820 0.010
1971ROAn....7....1C
V 4.810 0.004
2001KFNT...17e.409K
R 4.510 ~ 1978A&AS...34..477M
I 4.360 ~ 1978A&AS...34..477M
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