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Details for Revision 4
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Name
  BS UMa  
AAVSO UID
000-BFP-028 (6984 observations)  
Constellation
Ursa Major Sequence
J2000.0
11 25 41.60 +42 34 49.1  (171.42333 +42.58031) Search nearby
B1950.0 11 22 58.31 +42 51 19.3
Galactic coord. 165.825 +66.711
Other names

(Internal only)
1RXS J112540.3+423449 1SWASP J112541.63+423449.6 2MASS J11254164+4234497
2RXS J112540.4+423449 ASASSN-V J112541.52+423448.8 CMC15 J112541.6+423449
GSC 03015-01285 SON 7753 TIC 148675964
UCAC4 663-057189 XMMSL2 J112541.5+423447  
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Variability type
EA
Spectral type K
Mag. range
12.0 - 12.6 V
Discoverer --
Epoch
09 May 2004 (HJD 2453134.7088) Ephemeris
Outburst --
Period 0.34950987 d  (8.388237 h)
Rise/eclipse dur. 12%  (1.0066 h)
Remarks
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1 Peretto, Ivo Min I amplitude 0.5 V. Min II amplitude 0.3 V. Long-term spot cycle: 3300 d. Small amplitude flares (e.g. JD 2460351.89) also present.
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References
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1 Luo, A. -L.; Zhao, Y. -H.; Zhao, G.; et al., 2019, LAMOST DR5 catalogs 2019yCat.5164....0L
2 Masci, F. J.; et al., 2019, The Zwicky Transient Facility: Data Processing,
Products, and Archive		 2019PASP..131a8003M
3 Kochanek, C. S.; et al., 2017, The All-Sky Automated Survey for Supernovae
(ASAS-SN) Light Curve Server v1.0		 2017PASP..129j4502K
4 Ricker, G. R.; et al., 2014, Transiting Exoplanet Survey Satellite (TESS) 2014SPIE.9143E..20R
5 P. Wils, P. Lampens, P. Van Cauteren, J. Southworth, 2010, IBVS 5940 2010IBVS.5940....1W
6 P. Wils, P. Lampens, P. Van Cauteren, J. Southworth, 2010, IBVS 5940 2010IBVS.5940....1W
7 R. Diethelm, 2009, IBVS 5894 2009IBVS.5894....1D
8 Norton A.J. et al., 2007, astro-ph/0702631 2007astro.ph..2631N
9 L.Meinunger, W.Wenzel, VSS 7, H.4, 389, 1968. 1968VeSon...7..385M
10 C.Hoffmeister, AN 287, H.4, 169, 1963. 1963AN....287..169H
External Links
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Supporting Documents
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4 Phase Plot Long Time Peretto, Ivo 2025-06-23 22:25 UTC Phase plot long time with ASAS-SN, ZTF, TESS-SPOC and SSv-UAI-GRAV.
3 Phase Plot EA Peretto, Ivo 2025-06-23 22:24 UTC Phase plot EA with ASAS-SN, ZTF, TESS-SPOC and SSV-UAI-GRAV.
2 JD Plot Peretto, Ivo 2025-06-23 22:23 UTC JD plot with ASAS-SN, ZTF, TESS-SPOC and SSv-UAI-GRAV.
1 JD Plot TESS-SPOC Peretto, Ivo 2025-05-29 20:44 UTC JD plot with TESS-SPOC data, flare evidence.
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Revision History
Currently approved revision is checked. Click revision number to view details of that revision.
5 Peretto, Ivo 2025-05-29 20:05 UTC Position from Gaia DR3. Spectral type from 2019yCat.5164....0L. Type, range, period, epoch and eclipse duration from ASAS-SN, ZTF, TESS-SPOC and SSV-UAI-GRAV data.
4 Admin, VSX 2010-05-29 02:05 UTC Update from [2010IBVS.5940....1W].
3 Admin, VSX 2010-01-05 04:43 UTC Position updated from the GCVS version of November 2009.
2 Admin, VSX 2009-08-05 00:13 UTC Update from [2009IBVS.5894....1D].
1 Admin, VSX 2005-12-18 01:33 UTC Initial upload.

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