NGC 3628- Leo Triplet (Part 1)
Spiral Galaxy NGC 3628 (= H V.8 = Arp 317), type Sc, in Leo

by Richard A. Bennion, Ewell Observatory

LRGB Composite
Click Here for the 100% Resolution Version

LRGB Image Details:

48 Luminance Sub-Exposures @ 300 Seconds Each (See Luminance Data below)
10 Sub-Exposures each of Red, Green and Blue @ 300 Seconds 2x2 binned
Astrodon RGB True Balance Filters
* Note: No color balance adjustments were made to the above image. RGB Weights used = 1:1:1
Total Exposure Time: 6.5 Hours
Celestron C9.25 @ F/10 (.57 Arc-Seconds)
AP900GTO
SBIG ST10XME (Self Guided)
Optec Pyxis Rotator
Optec TCF Focuser

Luminance Data

Image Details:

48 Sub-Exposures @ 300 Seconds Each
Total Exposure Time: 14400 seconds (4.00 Hours)
Celestron C9.25 @ F/10 (.57 Arc-Seconds)
AP900GTO
SBIG ST10XME (Self Guided)
Optec Pyxis Rotator
Optec TCF Focuser

CCDAutoPilot Acquisition Specifications:

All images taken unattended and automatically.
Focused every 20 minutes using SkyStar Focusing
Enhanced Dithering Routine @ 3.5 Pixels
Auto Guider Self Centering Mode
FWHM Average of all 101 exposures = 2.5"