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 |
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| 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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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 |
|
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| 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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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 |
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| 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 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 |
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| 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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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 |
|
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|
| Robert Zebahl |
70mm f/5.7, 67x, Bortle 6, SQM-L 19.2
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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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 |
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| 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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