Daily Archives: February 11, 2015

The Leo Triplet


The Leo Triplet (also known as the M66 Group) is a small group of galaxies about 35 million light-years away in the constellation Leo. This galaxy group consists of the spiral galaxies M65, M66, and NGC 3628. A spiral galaxy is a certain kind of galaxy originally described by Edwin Hubble in his 1936 work The Realm of the Nebulae and, as such, forms part of the Hubble sequence. Spiral galaxies consist of a flat, rotatingdisc containing stars, gas and dust, and a central concentration of stars known as the bulge. These are surrounded by a much fainter halo of stars, many of which reside in globular clusters.

Imaging telescopes or lenses: Takahashi Epsilon 180ED
Imaging cameras: SBIG STT 8300M
Mounts: Orion Atlas EQ-G
Guiding telescopes or lenses: Takahashi Epsilon 180ED
Guiding cameras: SBIG STT 8300M
Software: PixInsight,  Maxim DL
Filters: Baader R 1.25” Filter,  Baader B 1.25” Filter,  Baader G 1.25” Filter
Resolution: 2451×2013
Dates: Jan. 17, 2015
Baader B 1.25” Filter: 16×130″ bin 1×1
Baader G 1.25” Filter: 16×100″ bin 1×1
Baader L 1.25” Filter: 16×100″ bin 1×1
Baader R 1.25” Filter: 16×100″ bin 1×1
Integration: 1.9 hours
Avg. Moon age: 25.63 days
Avg. Moon phase: 16.24%
RA center: 169.991 degrees
DEC center: 13.219 degrees
Pixel scale: 2.216 arcsec/pixel
Orientation: -86.516 degrees
Field radius: 0.976 degrees
Locations: Home Observatory, Stanford, California, United States
Author: jerryyyyy