Comet Hartley and the Double Cluster

on Sunday, October 10, 2010

2624

Lexington, Mass. Suburban skies; 50-45F, low humidity and clear; comet high in the sky

October 8, 2010, 12:24am to 3.54am; in the image above, the comet is located at its 12:24am position (see explanation below)

Takahashi E160 astrograph (6" F/3.3) with field flattener and CLS Astronomik filter

Image scale is about 1.5deg x 2.0deg

Takahashi EM-1 mount; unguided; tracking stars

Canon 450D (modified by Hap Griffin)

84 subs of 120sec each (total exposure 2h 48m); 1600 ISO

20 darks, 20 flats, 20 bias files; processed as usual

Captured with Mike Unsold's ImagesPlus 4.0; processed with ImagesPlus 3.82, Photoshop C4, and Noise Ninja

Procedure: (1) comet aligned and stacked; (2) stars aligned and stacked; (3) images blurred and recombined as explained below.

Explanation of procedure: Same general procedure as for described for Comet NcNaught here: www.alliancestrategy.com/Astro/Mcnaught.htm. The procedure was developed by Bernhard Hubl.

Comments

To leave a comment you must be a member of our community.
Login to your account now, or register for an account to start participating.

No one has commented yet.

ABOUT THE MAGAZINE

SUBSCRIBER EXTRAS

IN EVERY ISSUE

COLUMNISTS

FEATURES

RECENT HEADLINES

TOPICS

RECENT HEADLINES

TOPICS

RECENT HEADLINES

TOPICS

PICTURE OF THE DAY

RECENT GALLERIES

TOPICS

RECENT POSTS

TOPICS

READER GALLERIES

TOPICS

NEW PRODUCTS

IN OUR STORE

CURRENT ISSUE