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Latest Details
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Name
  BE UMa  
AAVSO UID
000-BFP-018 (108 observations)  
Constellation
Ursa Major Sequence
J2000.0
11 57 44.83 +48 56 18.3  (179.43679 +48.93842) Search nearby
B1950.0 11 55 09.84 +49 13 01.3
Proper motion
RA: 13.8 +/- 2.6 mas/yDec: -16.8 +/- 3.0 mas/ySource: UCAC4
Galactic coord. 144.811 +65.846
Other names

(Internal only)
Please note that aliases shown in grey link to obsolete records.
2MASS J11574483+4856184 ASASSN-V J115744.98+485618.3 ATO J179.4368+48.9383
CRTS J115744.8+485619 CSS_J115744.8+485619 Downes BE UMa
GALEX J115744.8+485617 GSC2.3 N21200127065 Gaia DR2 786919754746647424
Gaia DR3 786919754746647424 LAMOST J115744.83+485618.1 LINEAR 2639856
LTNF 1 PG 1155+492 PK 144+65 1
PN G144.8+65.8 PTF1 J115744.84+485618.2 SBC9 696
SBSS 1155+492 SDSS J115744.83+485618.1 SDSS J115744.83+485618.2
SDSS J115744.83+485618.4 SVS 1424 TIC 11940011
UCAC4 695-052298 USNO-A2.0 1350-08033471 USNO-B1.0 1389-0221431
WD 1155+492 WISEA J115744.84+485618.1 ZTF J115744.84+485618.1
ZTF18aaadclg    
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Variability type
EA/WD+R
Spectral type DO+M1/5Ve
Mag. range
14.66 - 17.2 g
Discoverer --
Epoch
23 Nov 2022 (HJD 2459906.928) Ephemeris
Outburst --
Period 2.291179 d
Rise/eclipse dur. 2.1%  (1.15 h)
Remarks
Some references may be clicked to view in new window. Roll over index number to view submission details.
1 GCVS Team d = 0.006P. Outside eclipses var 14.8m <= B <= 16.0m (reflection effect). The depth of eclipses for lambda lambda 3330 - 3700 A is greater than 4.3m,that for lambda lambda 5265 - 6005 A is 1.5m.
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References
Click reference title/citation to view in new window. Roll over index number to view submission details.
1 ZTF Catalog of Periodic Variable Stars (online data) 2020arXiv200508662C
2 Chen, X.; et al., 2020, The Zwicky Transient Facility Catalog of Periodic
Variable Stars
2020arXiv200508662C
3 Masci, F. J.; et al., 2019, The Zwicky Transient Facility: Data Processing,
Products, and Archive
2019PASP..131a8003M
4 Gaia Collaboration; et al., 2018, Gaia Data Release 2. Summary of the
contents and survey properties
2018A&A...616A...1G
5 Drake, A. J.; et al., 2014, The Catalina Surveys Periodic Variable Star
Catalog (version May 24, 2017)
2014ApJS..213....9D
6 L. Palaversa, Z. Ivezic, L. Eyer et al., 2013, arXiv:1308.0357
[astro-ph.GA]
2013arXiv1308.0357P
7 Light curve from CRTS/CSS (Drake et al. 2009, ApJ, 696, 870) 2009ApJ...696..870D
8 R.A. Downes et al., 2001, PASP 113, 764 (2006 archival version) 2005JAD....11....2D
9 R.A. Downes et al., 2001, PASP 113, 764 2001PASP..113..764D
10 Ferguson, D. H.; Liebert, J.; Cutri, R.; et al., 1987, BE Ursae Majoris: A
Detached Binary with a Unique Reprocessing Spectrum
1987ApJ...316..399F
11 C.BarbierI, R.Barbon, L.de Bastiani, G.Romano, P.Pesch, N.Sanduleak, AsAp
Suppl 61, 163, 1985.
1985A&AS...61..163B
12 V.P.Goranskij, S.Yu.Shugarov, Manuscript, 1985. --
External Links
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Location    Go   
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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 = 13.96H = 13.71K = 13.63J - K = 0.33
AllWISE W1 = 13.58W2 = 13.43W1 - W2 = 0.15
APASS-DR9 B = 15.44V = 15.37g' = 15.34r' = 15.31i' = 15.03B - V = 0.06
GALEX-DR5 FUV = 14.00NUV = 14.60FUV - NUV = -0.60
SDSS-DR12 u = 15.48g = 15.77r = 15.88i = 15.86z = 15.85u - g = -0.29r - i = 0.02
Images
Please review Digitized Sky Survey Acknowledgment and Copyright.
Size 5' x 5' (297 x 298 pixels)
Center 11 57 44.83 +48 56 18.3 (J2000)
Source STScI
Survey

Red, all sky, 1.0 arcsec/pixel
  Negative
Supporting Documents
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2 Zoomed phase plot Otero, Sebastian Alberto 2025-04-10 20:55 UTC Phase plot showing the primary minimum and the amplitude difference between passbands.
1 Phase plot Otero, Sebastian Alberto 2025-04-10 20:53 UTC Phase plot with ZTF data.
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Revision History
Currently approved revision is checked. Click revision number to view details of that revision.
6 Otero, Sebastian Alberto 2025-04-10 20:53 UTC Period, epoch, eclipse duration and range from ZTF data. Spectral type from 1987ApJ...316..399F.
5 Otero, Sebastian Alberto 2021-10-26 10:35 UTC ZTF name from 2020arXiv200508662C added. Gaia EDR3 position.
4 Otero, Sebastian Alberto 2020-05-14 23:52 UTC Gaia DR2 position.
3 Otero, Sebastian Alberto 2018-08-28 01:34 UTC Type from 2014ApJS..213....9D (2017 version). UCAC4 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.