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Current system
21257+4043
COU 2306
Nearby doubles
25' : 21248+4106
COU2305
26' : 21279+4046
TDT2979
29' : 21260+4112
HDS3052
32' : 21228+4031
HO 287
38' : 21281+4110
COU2231
38' : 21286+4102
UC 262
39' : 21250+4122
ES 1692
44' : 21219+4049
GRV 456
45' : 21241+4002
ES 1994
46' : 21259+3959
TDT2958
48' : 21217+4053
ES 1691
49' : 21267+3957
MLB1021
50' : 21264+3954
RAO 455
52' : 21302+4044
MLB 26
54' : 21275+3954
MLB 984
54' : 21240+3954
TDT2944
55' : 21221+4011
ES 2518
55' : 21256+4138
A 618
60' : 21260+4144
BLL 54
60' : 21298+4005
TDT2995
63' : 21276+3944
MLB 985
64' : 21299+4001
MLB 960
64' : 21215+4002
SEI1511
65' : 21308+4013
MLB 896AB
66' : 21209+4010
UC 259AB
66' : 21212+4003
COU2230
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Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.
WDS 21257+4043 : VIRTUAL EYEPIECE
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Radius:
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Components only
WDS 21257+4043 : ALADIN DSS IMAGE @ 21
h
25
m
44.20
s
+40° 43' 43.3"
DSS color
DSS blue
2MASS
AllWISE
GALEX
SDSS9
XMM
PanSTARRS