Thursday, March 26, 2015

Map To 100 ALBNs

It's time to plan out the rest of the imaging needed to complete the ALBN. At this point it's looking quite likely that I'll be able to finish my 100 objects this year, thanks mainly to March cooperating and allowing eight objects to be completed.

The table below suggests there are 19 reasonably accessible objects to be had between now and September. Thanks to using short focal lengths they can be all be captured in 13 images. The two camera lenses will acount for nine objects in five images, with the remainder split between the AT65 and TV102.

If I finish or be close to it by mid-July I'll be free to use a possible trip to the Nebraska Star Party for creating pretty LRGB images instead of going after one of the faint ALBNs.

April (4 / 91)
Object LBN
brightness
Imager
LBN 1088
5
200mm
LBN 1089
LBN 1090
5
5
135mm
Sh 2-210
5
TV102
May-June (9 / 100)
Object LBN
brightness
Imager
LBN 11
LBN 10
LBN 8
LBN 1122
5
6
6
4
135mm
Sh 2-13
Sh 2-12
4?
4
200mm
NGC 6357
4?
AT65 or TV102
LBN 20
LBN 22
4
5
TV102 or AT65
June-July (5 / 105)
Object LBN
brightness
Imager
LBN 70
6
200mm
IC 4701
LBN 52
4
2
AT65
IC 4812
NGC 6729
?
?
AT65
August-September (2 / 107)
Object LBN
brightness
Imager
LBN 140
6
AT65
LBN 434
6
AT65

We've finally gotten some snow and the ground is again white. This means that Cherry Grove is not really suitable for use for a while. The snow needs to melt and the field needs some time to dry; it will probably be ready again around Easter. Until then I'll be working from my back yard and will be limited to narrowband.

Tonight is forecast to be clear, so I'll be able to test the 200mm at long last.

If you have the feeling I want to be done with the ALBN, you are correct.

EDIT: Looking for a backyard target on 3/29 I discovered that SkyTools3 has incorrect coordinates for LBN 10. This object is actually part of the LBN 8/11/1122 area. All four objects are a slightly better fit in the 135mm field oriented N-S, so I've changed the table to show this. I'm going to check the coordinates of all the table's objects against the SIMBAD database.

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