Variable Star CO lac


CO lac = AN 1933.0062 = BD +56 2857 = HD 240058 = SAO 034798 

GCVS result

ID: 450115
Variable star: CO Lac
RA 2000: 224630.0
DE 2000: +564932
RA 1950:
DE 1950:
Type of variability: EA/DM
Max (mag): 10.28
Min (mag): 10.89
Photometric system: V
Epoch (JD): 27534.0728
Period (d): 1.5422075
Year of outburst for N, SN:
M-m (or D): 13 *
Spectrum: B8.5IV+B9.5V
Study reference: 05710
Chart or phot. ref.: 01965
Cases of non-existence:

GCVS NOTE result

Min II 10.79. Apsidal motion with P = 42.3 yr is observed. There is a periodic term in The elements given in the Table: -0.0133d cos(157.7deg + 0.0359deg*E). Min II = 2427534.8439 + 1.5422075d*E + 0.0133d cos(157.7deg + 0.0359deg*E).

GCVS NOTES fulltext search:  

NSV: Suspected Variable NSV  not found.

BRKA result

Variable star: CO Lac
Brightness type: C11
Points: 6
RA 2000: 224629.9
DE 2000: +564932
Max (mag): 10.28
Min (mag): 10.89
Sec (mag):
Photometric system: V
Epoch (JD): 51910.1913
Period (d): 1.5422088
D (hour): 4.8
d (hour): 0
Astrophysical note:
Reference: SAC 72
Finding chart:

MEKA: Variable star CO lac not found.

DSS plate 15'x 15'

Image from the Digitized Sky Survey at the STScI Archive.


Please put the variable's designation into field in common style - for example: ZUMa, zuma, V477Cyg, v1182Cyg, NSV 255, nsv2544. Designation of bright variable stars like Beta Persei type in short style (three letters) - bet Per. The complete cross-identification among more then 30 catalogues will be done after submitting.
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 GCVS (2011)  43.675 records
 NSV (1997) 14.811 records
 BRKA (2001)  1.432 records
 MEKA (2001)  147 records
 CzeV, SvkV and RafV catalogues (new variables)
 BCVS (1994)  529.953 records
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