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NGC 2451 in Puppis



Scope: FSQ-106N at f/5, Location: Blair Valley, Anza Borrego Desert, CA   1 February 2014  Camera: Atik 383L

Exposure: Exposure: 6 x 5 min  (1x1 bin) exposure with UV/IR block, 7 x 7 minutes (2x2 bin)  exposure with Hydrogen Alpha filter, 8 x 3.5 min (2x2 bin) RGB exposures.

Processing: Data Collection -  Artemis Capture (as FITs).  Calibrated, stacked (Sigma Combine), LRGB channel registration, equalization, and central gradient removal - Astroart.  Curves, Levels, LRGB combine and finishing  - Photoshop. This image is a  LHa- (HaR)GB combine with Luminance layering.  Color saturation in LAB color; Luminance and H-Alpha exposure stacks were blended for the luminance layer.   Final Image size is approximately 2400 x 1800.

North is to the right in this image. In this image the open cluster NGC 2451 is really the line of sight alignment of two open clusters NGC 2451A and NGC 2451B. Taken together or apart, the clusters are sparse. This field is located in the constellation of Puppis. The clusters are to the right in this image. A bright magnitude 3.62 red giant, C Puppis (SAO 198398), is near the clusters - the "A" cluster is to the lower left of the bright star; the "B" cluster is to the lower right. The red giant is believed to be a member of Cluster "B". The background field stars are plentiful in this view. The red glow in the background is hydrogen gas energized to emission levels.  NGC 2451A is about 640 light years distant from Earth; NGC 2451B about 1,180 light years distant; and C-Pup about 1,085 light years distant. This image replaces and earlier image in the Archives here.  Horizontal FOV is 120'

Image center is approximately - Equatorial 2000: RA: 07h 45m 13s Dec: -3821'17"


All images and content remain the property of Jim Thommes - copyright 2003 - 2014

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