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Technical card

Imaging telescopes or lenses: Stellarvue SV4

Imaging cameras: Pentax K10D

Mounts: Losmandy G11 Gemini II

Guiding telescopes or lenses: Stellarvue SV 70 ED

Guiding cameras: Orion SSAG

Software: Adobe Lightroom 3Stark Labs DSLR ShutterPixInsightMaxim DL

Filters: IDAS LPS-P2

Accessories: Stellarvue SSF6

Resolution: 3872x2604

Dates: Jan. 18, 2013

Locations: Menlo Park

Frames: 14x600"

Integration: 2.3 hours

Avg. Moon age: 6.45 days

Avg. Moon phase: 40.14%

RA center: 92.150 degrees

DEC center: 24.259 degrees

Pixel scale: 1.913 arcsec/pixel

Orientation: 91.497 degrees

Field radius: 1.240 degrees

Description

M35 as seen from the backyard on January 18, 2013. Taken while I was waiting for another target to rise.

The weather was iffy - there was a high haze initially and then it cleared nicely just before the target reached the meridian.

This is from a stack of 14 frames each 600 seconds at 400 ISO. This gives a total integration of 2 hours and 20 minutes.
As usual, the Stellarvue SV4 was used with the SSF6 flattener and an IDAS LPR V2 filter.

M35 has a special place for me regarding astrophotos. One of my first efforts with taking pictures of the night sky was with an old point and shoot, integrating 16 second exposures in photoshop. They were cruddy pictures with no real star color at all.

Guided and Calibrated using Maxim using 21 darks, 64 flats, 256 bias.
Stacked and debayered with DSS
Processed with Pix Insight

Here is the platesolve:
Referentiation Matrix (Gnomonic projection = Matrix * Coords[x,y]):
-0.000014276371 +0.000530632869 -0.663254360772
-0.000530623314 -0.000014228267 +1.045825851420
+0.000000000000 +0.000000000000 +1.000000000000
Resolution ........ 1.911 arcsec/pix
Rotation .......... -88.462 deg
Focal ............. 655.19 mm
Pixel size ........ 6.07 um
Field of view ..... 2d 3' 19.2" x 1d 22' 56.1"
Image center ...... RA: 06 08 36.268 Dec: +24 15 26.88
Image bounds:
top-left ....... RA: 06 05 40.236 Dec: +25 18 04.86
top-right ...... RA: 06 05 28.623 Dec: +23 14 48.75
bottom-left .... RA: 06 11 46.914 Dec: +25 15 50.40
bottom-right ... RA: 06 11 29.429 Dec: +23 12 36.45

Comments

Stephen Migol
License: None (All rights reserved) Nov. 2, 2013

Sky plot

Sky plot

Histogram

M35 on Jan 18, 2013, Stephen Migol