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Name
  CK Aur  
AAVSO UID
000-BDG-834 (763 observations)  
Constellation
Auriga Sequence
J2000.0
05 09 49.31 +36 57 44.1  (77.45546 +36.96225) Search nearby
B1950.0 05 06 26.64 +36 53 59.5
Proper motion
RA: -0.742 +/- 1.192 mas/yDec: -5.337 +/- 2.352 mas/ySource: Gaia DR1
Galactic coord. 169.161 -1.770
Other names

(Internal only)
2MASS J05094931+3657440 AN 160.1935 GSC 02401-00715
Gaia DR3 185767716491526144 P 2691 TIC 122778619
TYC 2401-715-1 UCAC4 635-022410  
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Variability type
EA
Spectral type A0
Mag. range
11.57 V (0.27)TESS
Discoverer O. Morgenroth
Epoch
05 Dec 2022 (HJD 2459918.954) Ephemeris
Outburst --
Period 4.57871 d
Rise/eclipse dur. 3.9%  (4.3 h)
Remarks
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1 Otero, Sebastian Alberto Varying amplitude eclipses. Discovery amplitude was 1.0 p. Current Min I amplitude 0.19-0.27 TESS. Eccentric system. Min II amplitude (0.00-0.08 TESS) at phase 0.568. Duration 4.3%.
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References
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1 Huang, C. X.; et al., 2020, Photometry of 10 Million Stars from the First
Two Years of TESS Full Frame Images: Part I
2020RNAAS...4..204H
2 Kochanek, C. S.; et al., 2017, The All-Sky Automated Survey for Supernovae
(ASAS-SN) Light Curve Server v1.0
2017PASP..129j4502K
3 N.E.Kurochkin, Perem. Zvezdy 8, N5, 351, 1952. 1951PZ......8..351K
4 O.Morgenroth, AN 255, 425, 1935. 1935AN....255..425M
External Links
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Catalog Data
Information from selected catalogs obtained by cross-matching to 2 arc seconds using the CDS X-Match Service. These data may not be complete.
2MASS J = 10.71H = 10.65K = 10.58J - K = 0.13
AllWISE W1 = 10.52W2 = 10.55W3 = 10.54W1 - W2 = -0.02
APASS-DR9 B = 11.94V = 11.59g' = 11.72r' = 11.51i' = 11.44B - V = 0.35
Images
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Supporting Documents
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1 Phase plot Otero, Sebastian Alberto 2025-07-30 23:03 UTC Phase plot with ASAS-SN and TESS QLP data.
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Revision History
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3 Otero, Sebastian Alberto 2025-07-30 23:02 UTC Period, epoch, eclipse duration and amplitude from TESS QLP and ASAS-SN data. Mean magnitude derived from Gaia DR3 and ASAS-SN data. Gaia DR3 position.
2 Admin, VSX 2010-01-05 04:43 UTC Position updated from the GCVS version of November 2009.
1 Admin, VSX 2005-12-18 01:33 UTC Initial upload.