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Name
  CSS_J102714.3+205943  
AAVSO UID
000-BPZ-542 (1129 observations)  
Constellation
Leo Sequence
J2000.0
10 27 14.31 +20 59 43.4  (156.80963 +20.99539) Search nearby
B1950.0 10 24 30.31 +21 15 02.3
Proper motion
RA: -7.5 +/- 12.6 mas/yDec: -0.4 +/- 2.9 mas/ySource: UCAC4
Galactic coord. 215.570 +56.633
Other names

(Internal only)
2MASS J10271432+2059434 ASASSN-V J102714.34+205943.8 GSC 01426-00590
TIC 171599792 UCAC4 555-048044 USNO-A2.0 1050-06284879
USNO-B1.0 1109-0191288 ZTF J102714.30+205943.4  
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Variability type
HADS
Spectral type --
Mag. range
13.55 - 13.95 V
Discoverer --
Epoch
12 Feb 2022 (HJD 2459623.4265) Ephemeris
Outburst --
Period 0.068419093 d  (98.523494 min)
Rise/eclipse dur. 32%  (31.5275 min)
Remarks
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1 Pyatnytskyy, Maksym J-K= 0.13, B-V= 0.19 (AAVSO PMAK data). Period decreased between JD2454800 and JD2457300. Elements in the table are for JD > 2457300 [2025OEJV..260....1P].
2 2020arXiv200508662C Epoch of minimum given.
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References
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1 Pyatnytskyy, M. Yu; Andronov, I. L, 2025, The HADS Star
CSS_J102714.3+205943: a Component of a Binary System with an Elliptic
Orbit?
2025OEJV..260....1P
2 Gaia collaboration; et al., 2022, Gaia Data Release 3 (Gaia DR3) Part 1
Main source
2022yCat.1355....0G
3 ZTF Catalog of Periodic Variable Stars (online data) 2020arXiv200508662C
4 Chen, X.; et al., 2020, The Zwicky Transient Facility Catalog of Periodic
Variable Stars
2020arXiv200508662C
5 A.J. Drake, M.J. Graham, S.G. Djorgovski et al., 2014, The Catalina Surveys
Periodic Variable Star Catalog
2014ApJS..213....9D
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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 = 13.26H = 13.20K = 13.13J - K = 0.13
AllWISE W1 = 13.15W2 = 13.15W3 = 12.45W1 - W2 = -0.00
APASS-DR9 B = 14.01V = 13.84g' = 13.79r' = 13.82i' = 13.84B - V = 0.17
SDSS-DR12 u = 15.07g = 14.14r = 13.83i = 13.91z = 14.03u - g = 0.93r - i = -0.08
Images
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Supporting Documents
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Revision History
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3 Pyatnytskyy, Maksym 2025-06-17 13:46 UTC Rise duration, period, and epoch from 2025OEJV..260....1P. Range calibrated with Gaia DR3 data.
2 Otero, Sebastian Alberto 2021-10-26 00:36 UTC Update from 2020arXiv200508662C. Gaia EDR3 position.
1 Admin, VSX 2014-05-22 01:02 UTC Initial upload.