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Name
S Equ
AAVSO UID
Constellation
J2000.0
B1950.0
20 54 43.25 +04 53 13.4
Proper motion
RA: 16.083 +/- 0.065 mas/y Dec: -2.869 +/- 0.038 mas/y Source: Gaia DR1
Galactic coord.
53.315 -24.966
Other names(Internal only)
Please note that aliases shown in grey link to obsolete records.
AAVSO 2052+04
AN 56.1916
ASAS J205713+0504.8
BD+04 4584
HD 199454
HIP 103419
HV 3412
SAO 126399
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Variability type
EA/SD
Spectral type
B9V+F9III-IV
Mag. range
8.35 - 10.40 V
Discoverer
Johanna Mackie (1916)
Epoch
Outburst
--
Period
3.4360969 d
Rise/eclipse dur.
13% (10.721 h)
Remarks
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1
Wunder, Edgar
Min II: V= 8.46.
2
GCVS Team
Min II 8.11. P var. Before JD2427000 Min = 2423746.490 + 3.4360050d*E [V.P.Zessewitsch, Astron. Tsirk. N164, 1955.]; Min = 2437968.345 + 3.436072d*E (JD2427000 - 41000) [M.Plavec, BAC 15, 23, 1964. ]; since JD2441000 - see Table. Gaseous streams; in Min light Halpha is in emission.
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References
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1
Samus, N. N.; Kazarovets, E. V.; Durlevich, O. V.; et al., 2017, General
2017ARep...61...80S
2
Bob Nelson's O-C files, 2016
--
3
Paschke, A., 2014, OEJV #162
2014OEJV..162....1P
4
G.Pojmanski, Acta Astronomica 52, 397, 2002.
2002AcA....52..397P
5
S. Zola, Acta Astronomica 42, 93, 1992.
1992AcA....42...93Z
6
A.D.Mallama, ApJ Suppl 44, 241, 1980.
1980ApJS...44..241M
7
H.Tashpulatov, Perem. Zvezdy 17, N1, 76, 1969.
1969PZ.....17...76T
8
Hartwig, E.; Muller, G., 1921, Benennung von neu entdeckten veraenderlichen
1921AN....212..353.
External Links
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Location
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AAVSO Variable Star Plotter
AAVSO Light Curve
AAVSO WebObs
APASS
AAVSOnet EPD
SIMBAD
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GCVS
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Hipparcos Epoch Photometry Plot
ASAS Light Curve
NSVS
CRTS
ZTF
Pan-STARRS1 Data
Pan-STARRS1 Images
SkyMorph
Kamogata Wide-field Survey (KWS)
O-C Gateway (name)
O-C Gateway (coords)
Atlas of O-C Diagrams
Lichtenknecker Database
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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 = 8.30 H = 8.24 K = 8.25 J - K = 0.05
AllWISE
W1 = 7.89 W2 = 7.92 W3 = 7.76 W4 = 7.63 W1 - W2 = -0.03 W3 - W4 = 0.13
APASS-DR9
SDSS-DR12
u = 12.52 g = 11.57 r = 10.73 i = 10.37 z = 9.09 u - g = 0.95 r - i = 0.37
Images
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Supporting Documents
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Revision History
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