Astronomical League
Arp Peculiar Galaxy Northern Program Images

Progress: 9/1/2016, 27/100

Latest Images: 135

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This page will eventually be submitted to the Minnesota Astronomical Society Astronomical League Awards Coordinator in fulfillment of the Arp Peculiar Galaxy Northern Observing Program (imaging option).

Click on the links in the table to view the images. Explanatory notes can be found below the imaged object list giving details about hardware, etc. Use your browser's "back" button to return to this page.

Listed below are the objects that were imaged sorted by Arp index number.

Arp
#
Alternate
Name(s)
Image Date and
Location
Trans. See. Imaging
Telescope
Imaging
Device
Link to
Image
013 NGC 7448 8/11/2015
StarHome
Fair
very light fog
Good C925FR ST-8300M Image
016 M66
NGC3627
4/8/2016
Cherry Grove
Very Good Good TV102 T2i Image
020 PGC 14892 10/7/2015 Fair Good C925FR ST-8300M Image
025 NGC 2276 9/26/2015 Fair Poor C925 ST-8300M Image
026 M 101
NGC 5457
4/*/2012
mulitple nights
Burnsville
Cherry Grove
Good Fair TV102FR ST-8300M Image
Ha, L
composite
028 NGC 7678 8/15-16/2015
Burnsville
Fair
decreasing to
Poor
Good C925FR ST-8300M Image
029 NGC 6946 8/21/2009
Burnsville
Good Good ST-80 XTi Image
076 M90
NGC 4569
4/8/2016
Cherry Grove
Very Good Good TV102 T2i Image
085 M 51
NGC 5194
4/13/2015
Burnsville
Good Fair C925 ST-8300M Image
099 NGC 7550
Hickson 93
9/13/2015
StarHome
Very Good Good C925FR ST-8300M Image
114 NGC 2300 9/26/2015 Fair Poor C925 ST-8300M Image
116 M60
NGC 4649
4/8/2016
Cherry Grove
Very Good Good TV102 T2i Image
134 M49
NGC 4472
4/8/2016
Cherry Grove
Very Good Good TV102 T2i Image
135 NGC 1023 9/1/2016
LLCC
Good Good TV102 T2i Image
on left
152 M87
NGC 4486
4/8/2016
Cherry Grove
Very Good Good TV102 T2i Image
168 M 32
NGC 221
8/9/2013
SD Star Party
Good Fair AT72ED ST-8300M Image
170 NGC 7578A
Hickson 94
9/13/2015
StarHome
Very Good Good C925FR ST-8300M Image
212 NGC 7625 9/8/2015 Very Good Fair C925FR ST-8300M Image
222 NGC 7727 10/6-7/2015 Fair Good C925FR ST-8300M Image
223 NGC 7585 10/6/2015 Fair Good C925FR ST-8300M Image
281 NGC 4631
Whale
5/13/2012
Cherry Grove
Good Fair TV102FR ST-8300M Image
284 NGC 7714 10/6/2015 Fair Good C925FR ST-8300M Image
298 NGC 7469 10/6/2015 Fair Good C925FR ST-8300M Image
317 M65, M66, NGC 3628
Leo Triplet
4/8/2016
Cherry Grove
Very Good Good TV102 T2i Image
319 NGC 7318B
Hickson 92
Stephan's Quintet
8/11/2015
StarHome
Fair
very light fog
Good C925FR ST-8300M Image
327 NGC 1875
Hickson 34
10/7/2015 Fair Good C925FR ST-8300M Image
337 M 82
NGC 3034
1/18/2010
Burnsville
Good Fair TV-102 XTi Image

NOTES:

All objects were located by star-hopping.

All images are scaled; many are cropped (particularly those taken with the C925).

All images on this web site are copyright © David Venne.


 

Explanatory Notes for Object Entries

Locations | Telescopes | Cameras | Filters
Software| Darkness



Locations
Name
Sky
Darkness*
Lat
Lon
Alt(m)
Burnsville
7 or 8
44°47'30"N
93°13'53"W
293
Cherry Grove Observatory
3
44°11'49"N
92°51'44"W
357
Eagle Lake Observatory
4
44°48'37"N
93°56'23"W
305
Iowa Star Party
2
41°48'30"N
94°39' 4"W
385
Jeffers Petroglyphs
2
44°05'23"N
95°03'28"W
387
Long Lake Conservation Center 2
46°38'49"N
93°27'54"W
389
Nebraska Star Party 1 42°36'18"N 100°55'49"W 945
StarHome Observatory
4
45°23'8"N
93°0'13"W
278
SD (South Dakota) Star Party 4
43°42'39"N
96°34'30"W
438
Wisconsin Observers Weekend
4
44°19'21"N
89°13'36"W
317

*See Sky Darkness explanation



Imaging Telescopes
Telescope
FL
mm
Field width*
arcmin
Field height*
arcmin
Image Scale
arcseconds/pixel
AT72ED** 432 (142) (107) (2.58)
TV102
876
87 (70)
58 (53)
1.01 (1.27)
TV102FR
700
109 (88)
72 (66)
1.26 (1.58)
C925
2350
32 (26)
22 (20)
0.38 (0.47)
C925FR***
1480
51 (42)
34 (31)
0.60 (0.75)
Image scale is fFor the Canon T2i (SBIG ST-8300M values in parentheses)
**Used only with SBIG ST-8300M
***Actual focal ratio may be f/6.0 or f/6.3


Imaging Devices

Canon XTi, unmodified, resolution 3888 x 2592, sensor size 22.2 x 14.9mm
Canon T2i, Gary Honis Baader modified, resolution 5184 x 3456, sensor size 22.2 x 14.9 mm
ST-8300M: SBIG ST-8300M monochrome CCD, unbinned resolution 3326 x 2504px, sensor size 18 x 13.5mm



Imaging Filters (used only with ST-8300M)

LRGB: Baader 36mm radius
Narrowband: Baader H-alpha (7nm), SII (8nm), and OIII (8.5nm), 36mm radius



Processing Software

Acquisition: ImagesPlus Camera Control, PHD autoguiding

Calibration, Alignment and Stacking: ImagesPlus

Further Processing: ImagesPlus, Photoshop, Annie's Astro Actions, Astronomy Tools.


Sky Darkness

Sky darkness is indicated using the Bortle scale:

1: Excellent dark-sky site
2: Typical truly dark site
3: Rural sky
4: Rural/suburban transition
5: Suburban sky
6: Bright suburban sky
7: Suburban/urban transition
8: City sky
9: Inner-city sky

Most of my images come from an inner suburb of a major metropolitan area (population about 2.5 million). Sky brightness varies strongly with direction here. The darkest portions of sky are overhead and may qualify as a 6 on the Bortle scale when nothing is present to diminish transparency; the northern half of my sky and the low southern sky are typically an 8.

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