Open Cluster M45 , type 'c', in Taurus

RA 03 : 47.0 (h:m); DEC +24 : 07 (deg:m); Distance 4400 light years;
Visual Brightness 1.6 (mag); Apparent Dimension 110.0 (arc min)

The Pleiades are among those objects which are known since the earliest times. At least 6 member stars are visible to the naked eye, while under moderate conditions this number increases to 9, and under clear dark skies jumps up to more than a dozen.

The Pleiades also carry the name "Seven Sisters"; according to Greek mythology, seven daughters and their parents. Their Japanese name is "Subaru": this is where the car factory got their name from. The Persian name is "Soraya", after which the former Iranian empress was named. Old European (e.g., English and German) names indicate they were once compared to a "Hen with Chicks".

Source and more: SEDS

It is the LORD who created the stars, the Pleiades and Orion ...... The LORD is his name! (the Bible: Amos 5:8)

M45 - The Pleiades - "The Seven Sisters"
January 20, 2010 19:47 - 21:46 UT.
Imaging: William Optics Zenithstar 80 ED II APO with William Optics 0.8 Focal reducer operating at f/5.4 [focal length approx 435mm] and Canon 1000D DSRL [unmodified] with Astronomik CLS clip filter.
Exposures: 12x120s [RAW]; ISO 800, autoguided with LX200 and SC3 modified webcam. Darks and bias subs, no flats.
Post processing: Deep Sky Stacker, PixInsight LE [DBE+Hist+Curves], NeatImage and Photoshop [with a lot of guidance from Rob Kantelberg]

M45 - The Pleiades - "The Seven Sisters".
November 7, 2009 20:39 - 21:58 UT.
Imaging: William Optics Zenithstar 80 ED II APO with Meade 3.3 Focal Reducer at f/3 [focal length 240 mm], ATK16IC camera, Astronomik LRGB filters.
Exposures: L: 10x180s [1x1]; RGB: 10x90s [1x1]; unguided.
Mouse in/out to hide/view the annotated version: Who is Who in The Pleiades with the names of the main stars.

M45 - The Pleiades - "The Seven Sisters".
December 29, 2008 19:32 - 20:32 UT.
Imaging: 135mm SLR Photolens [hence the spikes generated by the iris of the lens], ATK16IC camera, Astronomik LRGB filters.
Exposures: L: 15x120s [1x1]; RGB: 5x60s [2x2]; unguided.
[The imaging was witnessed by visiting Michael Booth from Launceston, Tasmania, Australia]

M45 - The Pleiades - "The Seven Sisters".
October 27, 2008 21:05 - 22:13 UT.
Imaging: William Optics Zenithstar 80 ED II APO with Meade 3.3 Focal Reducer at f/3 [focal length 240 mm], ATK16IC camera, Astronomik LRGB filters.
Exposures: L: 15x180s [1x1]; RGB: 5x60s [2x2]; unguided.

January 13, 2008 17:40 - 18:04 UT.
Imaging: 35mm SLR Photolens, ATK16IC camera, Astronomik LRGB filter.
Exposures: L: 25x30s; RGB: 5x30s; unguided.

January 9, 2008 21:08 - 21:09 UT.
Imaging: 35mm SLR Photolens, ATK16IC camera, Astronomik L filter.
Exposures: Lum only [because of trees]: 4x30s; unguided.

November 29, 2007 22:38 - 23:40 UT.
Imaging: William Optics Zenithstar 80 ED II APO with Meade 3.3 Focal Reducer at f/3 [focal length 240 mm], ATK16IC camera, Astronomik Blue filter.
Exposures: Blue only: 18x120s; unguided.

October 14, 2007 22:13 - 22:36 UT.
Imaging: William Optics Zenithstar 80 ED II APO, f/6.8 with 0.6 Mogg focal reducer [focal length approx. 245 mm],
Astronomik LRGB filters; ATK16IC b/w camera, K3CCDTools.
Exposures: LRGB: 5x60 seconds; unguided.

October 15, 2006 22:13 - 22:55 UT UT.
Imaging: 135mm SLR Photolens, Vesta SC3a RAW camera, Baader Infra Red Blocking Filter, 46 unguided exposures of 40 seconds.

October 27, 2005 00:02 - 00:22 UT.
Imaging: 135mm SLR Photolens, SC3a b/w camera, Baader Infra Red Blocking Filter, 24 autoguided exposures of 50 seconds.

January 15, 2005 20:06 - 20:43 UT.
Imaging: 200mm SLR Photolens, camera SC3a colour camera, Baader Infra Red Blocking Filter, 31 unguided exposures of 60 seconds.

January 12, 2005 19:34 - 19:35 UT .
Imaging: 200mm SLR Photolens, camera SC3a b/w RAW mode, Baader Infra Red Blocking Filter, only 8 unguided exposures of 7 seconds.
Camera settings: not recorded, as this image was only intented to determine the Field of view of my new 200mm SLR Photolens [83.49 x 62.62 arc minutes].

December 19, 2004 20:41 - 20:44 UT.
Imaging: 29mm SLR Photolens, Pro-SC3a b/w RAW mode, Baader Infra Red Blocking Filter and Astronomik H-Alpha filter, 25 unguided exposures of 7 seconds.

October 6, 2004 21:53 - 22:09 UT.
M45 was still very low in the skies [altitude 16.5 degrees] and trees were partially blocking my view, but I managed to capture my first images of this season.
Imaging and postprocessing as per my DSO imaging tutorial, enhanced with iPrep and NeatImage.

January 23, 2004 19:14 - 19:17 UT combined with December 18, 2003 21:43 - 22:25 UT.
YRGB post processing, Loreal and NeatImage.

Wide field image.
It was clear for the first time in weeks, but as the clouds were coming rapidly I had to hurry.
I managed to capture only 10 usable frames ...
January 21, 2004 19:18 - 19:21 UT.

December 18, 2003 21:43 - 22:25 UT.
YRGB post processing and Loreal.

December 17, 2003 21:46 - 22:39 UT.
I am happy with the nebulosity which is beginning to show.
YRGB post processing and Loreal.


November 3, 2002 22:15 UT
For the first time I used my home made piggy-back platform and ditto SLR Photolens camera adapter with my Olympus 28-70mm photolens - with a standard UV filter up front - set at 50mm.
It is nice to see some of the nebulosity of the Pleiades.


Same source AVI, but reprocessed on September 25, 2003 with the YRGB method K3CCDTools/iRIS/Photoshop and in addition Loreal