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Latest Details
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Name
  V1139 Her  
AAVSO UID
000-BKK-082 (2825 observations)  
Constellation
Hercules Sequence
J2000.0
15 50 28.49 +45 57 51.6  (237.61871 +45.96433) Search nearby
B1950.0 15 48 53.25 +46 06 54.4
Proper motion
RA: -21.786 +/- 1.004 mas/yDec: -61.790 +/- 1.194 mas/ySource: Gaia DR1
Galactic coord. 73.210 +50.093
Other names

(Internal only)
2MASS J15502847+4557516 ASASSN-V J155028.46+455750.7 ATO J237.6185+45.9640
GSC 03490-00814 Gaia DR2 1397868441596771712 Gaia DR3 1397868441596771712
LAMOST J155028.48+455751.6 TIC 156080705 TMTS J15502843+4557508
TYC 3490-814-1 ZTF J155028.44+455750.6  
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Variability type
SXPHE
Spectral type A7V
Mag. range
12.30 - 12.59 V
Discoverer --
Epoch
20 May 2020 (HJD 2458990.493) Ephemeris
Outburst --
Period 0.06858876 d  (98.76781 min)
Rise/eclipse dur. 41%  (40.495 min)
Remarks
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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
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 = 11.78H = 11.66K = 11.63J - K = 0.15
AllWISE W1 = 11.63W2 = 11.64W3 = 11.59W1 - W2 = -0.01
APASS-DR9 B = 12.68V = 12.39g' = 12.50r' = 12.38i' = 12.44B - V = 0.29
SDSS-DR12 u = 14.41g = 12.51r = 12.48i = 12.58z = 13.10u - g = 1.91r - i = -0.10
Images
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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
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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.