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Name
AB Dra
AAVSO UID
Constellation
J2000.0
B1950.0
19 51 04.15 +77 36 40.6
Proper motion
RA: -8.2 +/- 1.4 mas/y Dec: -9.9 +/- 3.0 mas/y Source: UCAC4
Galactic coord.
109.974 +23.486
Other names(Internal only)
Please note that aliases shown in grey link to obsolete records.
1RXS J194907.8+774415
1WGA J1949.1+7744
2E 1951.0+7736
2E 4296
2MASS J19490658+7744232
2RXS J194906.7+774421
2XMM J194906.4+774423
3XMM J194906.5+774423
AAVSO 1953+77
AN 90.1934
ASASSN-V J194906.49+774422.8
Downes AB Dra
GALEX J194906.6+774423
GALEX J194906.7+774423
GALEX J194906.8+774423
GSC 04588-01570
GSC2.3 N0YS000401
LPM +77.0445
NSVS 1256106
PPMX J194906.5+774423
SBC9 1189
SDSS J194906.51+774423.2
TASS4 3612140
TIC 237232687
UCAC4 839-016781
WEB 17146
WISE J194906.51+774423.1
WISEA J194906.52+774423.2
XMMOM J194906.5+774424
ZTF22aaeeiku
ZTF22aagqayq
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Variability type
UGZ
Spectral type
pec(UG)
Mag. range
12.3 - 16.2 V
Discoverer
Otto Morgenroth
Epoch
Outburst
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Period
0.1520 d (3.65 h)
Rise/eclipse dur.
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Remarks
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1
Schmeer, Patrick
Gaia DR2 parallax 2.4421 ± 0.0265 mas (distance 404.7 ± 4.4 pc).
2
Linnolt, Mike
Since late 2014, this star has had a dramatic change in behavior. It has shown characteristics of standstill from Dec 2014 - Feb 2015, a few typical UG-like outbursts, then more irregular behavior since end of Apr 2015, with rapid and peculiar variations in brightness of reduced intermediate amplitudes. It may be a UGZ subtype, or some other type, but further data is needed to clarify.
3
Otero, Sebastian Alberto
Never any standstill in decades of coverage.
4
Otero, Sebastian Alberto
GCVS outburst cycle is 13.4 d.
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References
Click reference title/citation to view in new window. Roll over index number to view submission details.
1
T. Kato, 2018, vsnet-chat #8113
--
2
Kochanek, C. S.; et al., 2017, The All-Sky Automated Survey for Supernovae
2017PASP..129j4502K
3
T. Kato, 2017, vsnet-alert #21266
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4
R.A. Downes et al., 2001, PASP 113, 764 (2006 archival version)
2005JAD....11....2D
5
R.A. Downes et al., 2001, PASP 113, 764
2001PASP..113..764D
6
M.Petit, JO 44, 6-10, 1961.
1961JO.....44....6P
7
Morgenroth, O., 1934, 77 neue Veränderliche
1934AN....252..389M
8
Simonsen, M. et al., The Z Cam List
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External Links
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Location
-- Select --
AAVSO Variable Star Plotter
AAVSO Light Curve
AAVSO WebObs
APASS
AAVSOnet EPD
SIMBAD
SIMBAD Clickable Map
SIMBAD Coordinate query
VizieR Search
Aladin Java Applet
CDS Portal
CDS Biblio
SDSS Navigate Tool
GCVS
Downes
ASAS-SN Variable
ASAS-SN Sky Patrol
NSVS
ZTF
ZTF Lasair Online Data
ALeRCE ZTF Explorer
SuperWASP
Pan-STARRS1 Data
Pan-STARRS1 Images
SkyMorph
Kamogata Wide-field Survey (KWS)
Go
Select a Location for more details.
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 = 13.62 H = 13.29 K = 13.11 J - K = 0.52
AllWISE
W1 = 12.39 W2 = 12.27 W3 = 12.94 W1 - W2 = 0.12
APASS-DR9
B = 15.21 V = 14.87 g' = 15.07 r' = 14.63 i' = 14.18 B - V = 0.34
GALEX-DR5
FUV = 15.29 NUV = 15.02 FUV - NUV = 0.28
SDSS-DR12
u = 15.62 g = 15.53 r = 15.28 i = 15.08 z = 14.90 u - g = 0.09 r - i = 0.19
Images
Please review Digitized Sky Survey Acknowledgment and Copyright .
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Supporting Documents
There are currently no supporting documents on file for this star.
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Campaigns/Programs
Z CamPaign
Legacy CVs
Revision History
Currently approved revision is checked. Click revision number to view details of that revision.
6
Schmeer, Patrick
2019-02-20 13:31 UTC
Type from vsnet-alert 21266 and vsnet-chat 8113. Minimum magnitude from ASAS-SN and AAVSO data data. Gaia DR2 position. Discoverer added from 1934AN....252..389M .
5
Linnolt, Mike
2015-05-15 13:18 UTC
Type changed from UGSS to UG due to major change in behavior since late 2014.
4
Otero, Sebastian Alberto
2012-04-09 23:16 UTC
Type from AAVSO data.
3
Otero, Sebastian Alberto
2011-03-28 19:03 UTC
Primary record creation. Orbital period and range from Downes (2001). UCAC3 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.
