IC405 Flaming Star Nebula - Auriga

M65 (left) - M66 (right) - Galaxies in Leo

  1. © Copyright 2017 by Lieven Persoons

M66 in Leo, or NGC3627 or UGC6346 or PGC34695 or ARP16.
RK 11h 20’ 18” / DEC +13° 01’ 00”
8.00’ x 2.50‘ / Vis m: 8.40 / Abs m: -21.35 / Type : Sb
Distance: Lj: 35 000 000 / diam: Ly: 50 000 / Rad.s: 591 km/s.

Messier 66 (also known as NGC 3627) is an intermediate spiral galaxy about 36 million light-years away in the constellation Leo. It was discovered by Charles Messier in 1780. M66 is about 95 thousand light-years across with striking dust lanes and bright star clusters along sweeping spiral arms. M66 is part of the Leo Triplet, a small group of galaxies that also includes M65 and NGC3628. As of 2015, four supernovae have been observed in M66.
Gravitational interaction from its past encounter with neighboring NGC 3628 has resulted in an extremely high central mass concentration; a high molecular to atomic mass ratio; and a resolved non-rotating clump of H I material apparently removed from one of the spiral arms. The latter feature shows up visually as an extremely prominent and unusual spiral arm and dust lane structures as originally noted in the Atlas of Peculiar Galaxies.

M66 was discovered by Charles Messier and included in his Messier Objects list. However, William Henry Smyth accidentally attributed the discovery to Pierre Méchain in his popular 19th century astronomical work A Cycle of Celestial Objects (stating "They [M65 and M66] were pointed out by Méchain to Messier in 1780"). This error was in turn picked up by Kenneth Glyn Jones in Messier's Nebulae and Star Clusters. This has since ramified into a number of other books by a variety of authors.
(From Wikipedia.org)

General Info


Image Data

Optics : TMB 152 @ f/8
Mount : 10micron GM2000 HPS II
Camera : Finger Lakes Instumentation FLI ML8300 cooled -40°C
Filterweel Finger Lakes Instumentation FLI CFW 5-7 with 50x50mm filters
Filters : Astrodon Gen2 Tru-Balance E-series LRGB  + Baader Ha 7nm 50x50mm
Exposures : total, 28h30 - H-alfa L: 430:610 (1x1 bin) RGB: 225:215:230 (2x2 bin)
Location : Verclause (France)
Date : 26/02/2017 & 16, 17, 20, 21, 28, 29, 30, 31/03/2017 & 18, 23, 24/04/2017
Comments : Data acquired remotely. Mount tracking unguided.

Size :