mu Boo (**)
|
Name: |
mu Boo, 51 Boo, Alkalurops |
Type: |
** |
Constellation: |
Boo |
Coordinates: |
15h24m29.54s / +37°22'37.10" |
Components: |
|
|
m1 |
m2 |
ρ |
θ |
Year |
CHR181, mu 1 Boo |
Aa-Ab |
4m3 |
None |
0.1" |
188° |
2012 |
STFA28, mu 1 Boo |
AB |
4m3 |
7m1 |
109.0" |
172° |
2018 |
STF1938, mu 2 Boo |
Ba-Bb |
7m1 |
7m6 |
2.3" |
3° |
2019 |
|
|
|
|
|
Robert Zebahl |
B 8x40, Bortle 7, NELM 5m0, SQM-L 19.2
STFA28 (AB): Easily split with obvious difference in brightness.
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70mm f/5.7, 22x, Bortle 6, SQM-L 19.2
STFA28 (AB): Evident, very wide apart and unequal. A: white-yellowish, B: grey.
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102mm f/11, 125x, Bortle 6-, SQM-L 19.2
STF1938 (Ba-Bb): Beautiful view! This triple system includes STFA 28 and STF 1938.
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120mm f/5, 23x, Bortle 6, NELM 5m0+, SQM-L 19.4
STFA28 (AB): Easy to split with large angular distance and noticeable difference in brightness.
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S 656 (**)
|
Name: |
S656 |
Type: |
** |
Constellation: |
Boo |
Coordinates: |
13h50m23.51s / +21°16'35.80" |
Components: |
|
|
m1 |
m2 |
ρ |
θ |
Year |
|
|
6m9 |
7m4 |
86.2" |
209° |
2018 |
|
Robert Zebahl |
B 8x40
2020-04-05: Wide, medium bright pair. Primary component appeared slightly orange, the companion greyish. The double star is in close vicinity to the star 6 Boo, which shines in a pale orange.
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|
70mm f/5.7, 22x, Bortle 6
2020-04-24: Widely separated with little difference in brightness. Both components appeared slightly yellowish. Standing close to 6 Boo, which also shines in a slight yellow.
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|
|
SHJ 191 (**)
|
Name: |
SHJ191 |
Type: |
** |
Constellation: |
Boo |
Coordinates: |
14h59m34.58s / +53°51'36.70" |
Components: |
|
|
m1 |
m2 |
ρ |
θ |
Year |
|
|
6m9 |
7m6 |
40.4" |
342° |
2018 |
|
Robert Zebahl |
B 8x40
2020-04-05: Easily separable with clearly visible difference in brightness. Nice separation of the components. Colors not perceptible.
|
|
55mm f/9.1, 27x
2020-04-05: Widely separated pair with rather small difference in brightness. Primary component: creamy white, companion: slightly orange.
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70mm f/5.7, 22x, Bortle 6
2020-04-24: Widely separated with a moderate difference in brightness. Striking. The brighter component appeared yellowish-orange, the fainter one somehow darker and occasionally also cooler.
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|
|
STF 1772 (**)
|
Name: |
STF1772, 1 Boo |
Type: |
** |
Constellation: |
Boo |
Coordinates: |
13h40m40.50s / +19°57'20.40" |
Components: |
|
|
m1 |
m2 |
ρ |
θ |
Year |
|
AB |
5m8 |
9m6 |
4.4" |
134° |
2017 |
|
AC |
5m8 |
12m2 |
87.5" |
26° |
2015 |
|
AD |
5m8 |
7m4 |
208.4" |
1° |
2010 |
|
Robert Zebahl |
70mm f/5.7, 22x, Bortle 6
AD: 2020-04-24: Very widely split with clearly visible difference in brightness. The primary component appeared white-yellowish, the companion pale orange.
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|
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STF 1821 (**)
|
Name: |
STF1821, kappa Boo, 17 Boo, Asellus Tertius |
Type: |
** |
Constellation: |
Boo |
Coordinates: |
14h13m29.00s / +51°47'23.80" |
Components: |
|
|
m1 |
m2 |
ρ |
θ |
Year |
|
AB |
4m5 |
6m6 |
13.7" |
236° |
2017 |
|
|
|
|
|
Robert Zebahl |
70mm f/5.7, 22x, Bortle 6
2020-04-24: Clearly separated with significant difference in brightness. The primary component showed a pale yellowish-orange color with a greyish companion. To the southeast there is the double star STFA 26.
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STF 1834 (**)
|
Name: |
STF1834 |
Type: |
** |
Constellation: |
Boo |
Coordinates: |
14h20m17.60s / +48°30'25.10" |
Components: |
|
|
m1 |
m2 |
ρ |
θ |
Year |
|
|
8m1 |
8m3 |
1.6" |
104° |
2018 |
|
|
|
|
|
Robert Zebahl |
120mm f/5, 150x, Bortle 6, NELM 5m0+, SQM-L 19.4
At 108x elongated, at 150x barely split with similarly bright components.
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|
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STF 1835 & BU1111 (**)
|
Name: |
STF1835 & BU1111, WDS14234+0827 |
Type: |
** |
Constellation: |
Boo |
Coordinates: |
14h23m22.74s / +08°26'47.90" |
Components: |
|
|
m1 |
m2 |
ρ |
θ |
Year |
STF1835 |
A-BC |
5m0 |
6m8 |
6.2" |
196° |
2018 |
BU1111 |
BC |
7m4 |
7m7 |
0.3" |
16° |
2018 |
|
|
|
|
|
Robert Zebahl |
102mm f/11, 62x
STF1835 (A-BC): At 28x barely split with visible difference in brightness. At 62x easy to separate. The colors seemed similar.
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|
|
STF 1838 (**)
|
Name: |
STF1838 |
Type: |
** |
Constellation: |
Boo |
Coordinates: |
14h24m05.76s / +11°14'49.10" |
Components: |
|
|
m1 |
m2 |
ρ |
θ |
Year |
|
|
7m5 |
7m7 |
9.7" |
335° |
2017 |
|
Robert Zebahl |
70mm f/5.7, 44x, Bortle 6
2020-04-24: At 22x small, fine and remarkable double star with small difference in brightness, at 44x with visible color difference: orange & white-bluish.
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|
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STF 1850 (**)
|
Name: |
STF1850 |
Type: |
** |
Constellation: |
Boo |
Coordinates: |
14h28m33.29s / +28°17'25.90" |
Components: |
|
|
m1 |
m2 |
ρ |
θ |
Year |
|
|
7m1 |
7m6 |
25.2" |
263° |
2018 |
|
Robert Zebahl |
B 8x40
2020-04-05: Separated, but still quite close together with a moderate difference in brightness.
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70mm f/5.7, 22x, Bortle 6
2020-04-24: Easily separated, medium bright with rather small difference in brightness and moderate distance. Fairly conspicuous. The components appeared white-yellowish and white-bluish. Beautiful double star.
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|
|
STF 1864 (**)
|
Name: |
STF1864, pi 1 Boo |
Type: |
** |
Constellation: |
Boo |
Coordinates: |
14h40m43.56s / +16°25'05.90" |
Components: |
|
|
m1 |
m2 |
ρ |
θ |
Year |
|
AB |
4m9 |
5m8 |
5.4" |
113° |
2019 |
|
Robert Zebahl |
70mm f/5.7, 31x, Bortle 6
2020-04-24: At 22x immediately visible as figure '8' with visible difference in brightness. Beside omicron Boo there are no other brighter stars in the nearer surroundings. At 31x cleanly split, but still close together with noticeable difference in brightness. Both components appear white. Beautiful sight. At 57x very nice with a slightly different color impression: white & dark yellow.
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STF 1877 (**)
|
Name: |
STF1877, epsilon Boo, Izar |
Type: |
** |
Constellation: |
Boo |
Coordinates: |
14h44m59.14s / +27°04'29.90" |
Components: |
|
|
m1 |
m2 |
ρ |
θ |
Year |
|
AB |
2m6 |
4m8 |
2.8" |
347° |
2018 |
|
Robert Zebahl |
55mm f/9.1, 125x
The fainter component was seen as permanent brightening on the first diffraction ring of the primary component.
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60mm f/10, 192x, Bortle 6-, SQM-L 19.1
Easy to split, whereby the much fainter component lies on the first diffraction ring of the primary component. The primary component itself appeared slightly yellowish.
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70mm f/5.7, 133x, Bortle 6, SQM-L 19.2
Easy to split, very unequal. A appeared in pale orange, B was visible as a very tiny, grey star on the first diffraction ring of component A.
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120mm f/5, 192x, Bortle 4, SQM-L 21.3
At 85x the fainter component was easily visible but not separated. At 192x well split. The fainter component was almost on the first diffraction ring of the primary component. Quite big difference in brightness. I did not looked at the color of the components.
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STF 1884 (**)
|
Name: |
STF1884 |
Type: |
** |
Constellation: |
Boo |
Coordinates: |
14h48m23.37s / +24°22'01.00" |
Components: |
|
|
m1 |
m2 |
ρ |
θ |
Year |
|
|
6m6 |
7m5 |
2.1" |
58° |
2019 |
|
|
|
|
|
Robert Zebahl |
102mm f/11, 86x
At 86x pretty tight and unequal. At 160x clearly split. A: white, B: slightly orange.
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STF 1886 (**)
|
Name: |
STF1886 |
Type: |
** |
Constellation: |
Boo |
Coordinates: |
14h51m02.31s / +09°43'25.20" |
Components: |
|
|
m1 |
m2 |
ρ |
θ |
Year |
|
AB |
7m6 |
9m7 |
7.9" |
224° |
2018 |
|
Robert Zebahl |
102mm f/11, 28x
At 28x, the B component appeared rather faint and pretty close to the primary component. At 62x both components were clearly visible and unequal. A: slightly orange, B: greyish.
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|
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STF 1888 & ARN11 (**)
|
Name: |
STF1888 & ARN11, xi Boo, 37 Boo |
Type: |
** |
Constellation: |
Boo |
Coordinates: |
14h51m23.38s / +19°06'01.70" |
Components: |
|
|
m1 |
m2 |
ρ |
θ |
Year |
STF1888 |
AB |
4m8 |
7m0 |
5.3" |
300° |
2018 |
STF1888 |
AC |
4m8 |
13m8 |
71.3" |
340° |
2015 |
STF1888 |
AD |
4m8 |
11m7 |
160.8" |
286° |
2015 |
ARN11 |
AE |
4m8 |
8m7 |
271.5" |
98° |
2015 |
ARN11 |
AF |
4m8 |
9m2 |
337.5" |
37° |
2015 |
STF1888 |
BC |
7m0 |
13m8 |
63.9" |
340° |
2001 |
STF1888 |
BE |
7m0 |
8m7 |
273.5" |
102° |
2009 |
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|
Robert Zebahl |
70mm f/5.7, 44x, Bortle 6
AB: 2020-04-24: Beautifully separated with quite a large difference in brightness in a lovely star field. The primary component shines yellowish with a faint companion.
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STF 1890 (**)
|
Name: |
STF1890, 39 Boo |
Type: |
** |
Constellation: |
Boo |
Coordinates: |
14h49m41.37s / +48°43'15.60" |
Components: |
|
|
m1 |
m2 |
ρ |
θ |
Year |
|
|
6m3 |
6m7 |
2.5" |
46° |
2019 |
|
|
|
|
|
Robert Zebahl |
70mm f/5.7, 100x, Bortle 6, NELM 5m0+, SQM-L 19.4
2020-04-18: At 57x very finely separated with extremely tightly spaced components that appeared equally bright. At 100x a very nice pair with little difference in brightness. Fantastic sight! The color of the components was slightly different: creamy-white & a touch of yellow-orange.
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70mm f/5.7, 67x, Bortle 6, SQM-L 19.2
2020-04-01: At 44x elongated, partly notched. At 67x split, but very tight. A difference in brightness was not seen. At 133x clearly separated with little difference in brightness. A appeared pale yellow, B rather warm-white.
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STF 1910 (**)
|
Name: |
STF1910 |
Type: |
** |
Constellation: |
Boo |
Coordinates: |
15h07m32.95s / +09°13'33.80" |
Components: |
|
|
m1 |
m2 |
ρ |
θ |
Year |
|
|
7m3 |
7m5 |
3.9" |
211° |
2019 |
|
Robert Zebahl |
70mm f/5.7, 44x, Bortle 6
2020-04-24: At 31x clearly visible as figure '8' and almost separated with similarly bright components. At 44x still very tight, but separated pair. Overall rather faint with little difference in brightness. The primary component appeared slightly yellowish-orange.
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STFA 26 (**)
|
Name: |
STFA26, iota Boo, 21 Boo |
Type: |
** |
Constellation: |
Boo |
Coordinates: |
14h16m10.07s / +51°22'01.30" |
Components: |
|
|
m1 |
m2 |
ρ |
θ |
Year |
|
AB |
4m8 |
7m4 |
38.9" |
33° |
2017 |
|
Robert Zebahl |
B 8x40
2020-04-05: Even with tripod the faint companion was not visible.
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70mm f/5.7, 22x, Bortle 6
2020-04-24: Similar view to the northwest standing kappa Boo. Nicely separated with larger distance and fainter companion. The primary component appeared rather white.
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STFA 27 (**)
|
Name: |
STFA27, delta Boo, 49 Boo |
Type: |
** |
Constellation: |
Boo |
Coordinates: |
15h15m30.16s / +33°18'53.40" |
Components: |
|
|
m1 |
m2 |
ρ |
θ |
Year |
|
AB |
3m6 |
7m9 |
105.0" |
78° |
2017 |
|
Robert Zebahl |
70mm f/5.7, 22x, Bortle 6
2020-04-24: Widely separated pair with large difference in brightness. Less striking. The bright primary component shines in a bright yellow.
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|
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STT 298 (**)
|
Name: |
STT298 |
Type: |
** |
Constellation: |
Boo |
Coordinates: |
15h36m02.22s / +39°48'08.90" |
Components: |
|
|
m1 |
m2 |
ρ |
θ |
Year |
|
AB |
7m2 |
8m4 |
1.3" |
187° |
2017 |
|
AB-C |
6m9 |
7m8 |
120.4" |
328° |
2017 |
|
AB-D |
6m9 |
13m9 |
167.4" |
224° |
2002 |
|
AB-E |
6m9 |
12m1 |
456.0" |
335° |
2002 |
|
|
|
|
|
Robert Zebahl |
102mm f/11, 28x
AB-C: Wide, moderately unequal pair. Little difference in color: Primary components appeared a bit more orange colored.
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|
120mm f/5, 23x, Bortle 6, NELM 5m0+, SQM-L 19.4
AB-C: Easy to split with large angular distance and noticeable difference in brightness.
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