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Name
  TYC 3490-814-1  
AAVSO UID
--  
Constellation
Hercules Sequence
J2000.0
15 50 28.40 +45 57 51.6  (237.61830 +45.96430) Search nearby
B1950.0 15 48 53.05 +46 06 51.2
Galactic coord. 73.210 +50.093
Other names

(Internal only)
2MASS J15502847+4557516 ATO J237.6185+45.9640 Gaia DR2 1397868441596771712
Gaia DR3 1397868441596771712 LAMOST J155028.48+455751.6 TIC 156080705
TMTS J15502843+4557508 ZTF J155028.44+455750.6  
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Variability type
SXPHE
Spectral type --
Mag. range
12.65 - 12.95 R1
Discoverer --
Epoch
03 Nov 1999 (HJD 2451486.31) Ephemeris
Outburst --
Period 0.068587 d  (98.765 min)
Rise/eclipse dur. --
Remarks
Some references may be clicked to view in new window. Roll over index number to view submission details.
1 Otero, Sebastian Alberto Strong period changes.
2 2012IBVS.6015....1W Two frequencies detected: 14.57979 and 13.7999 c/d.
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References
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1 Zhang, L.-y.; et al., 2023, Stellar Parameters and Spectroscopic Properties
of TESS Objects Observed in the LAMOST Low- and Medium-resolution Spectral
Survey		 2023ApJS..264...17Z
2 Gaia collaboration; et al., 2022, Gaia Data Release 3 (Gaia DR3) Part 1
Main source		 2022yCat.1355....0G
3 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
4 Masci, F. J.; et al., 2019, The Zwicky Transient Facility: Data Processing,
Products, and Archive		 2019PASP..131a8003M
5 Kochanek, C. S.; et al., 2017, The All-Sky Automated Survey for Supernovae
(ASAS-SN) Light Curve Server v1.0		 2017PASP..129j4502K
6 P. Wils, K. Panagiotopoulos, J. Van Wassenhove et al., 2012, IBVS 6015 2012IBVS.6015....1W
7 E.V. Kazarovets, N.N. Samus, O.V. Durlevich, N.N. Kireeva, E.N. Pastukhova,
2011, IBVS 6008		 2011IBVS.6008....1K
8 A.V. Khruslov, 2006, PZP 6, 7 2006PZP.....6....7K
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Supporting Documents
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1 Phase plot Otero, Sebastian Alberto 2025-11-30 04:33 UTC Phase plot with ZTF, ASAS-SN, TESS and Gaia DR3 data.
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Revision History
Currently approved revision is checked. Click revision number to view details of that revision.
3 Otero, Sebastian Alberto 2025-11-30 04:33 UTC Period, epoch, rise duration and range from TESS, ZTF, ASAS-SN, Gaia DR3 and AAVSO data. Spectral type from 2023ApJS..264...17Z.
2 Admin, VSX 2011-12-24 05:57 UTC Update from [2011IBVS.6008....1K].
1 Admin, VSX 2007-03-23 20:22 UTC Initial upload.

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