M 45* (Cr 42) Open Cluster in Taurus

Center of field at approximately: RA 03 hours 46 minutes 15 seconds, Dec +24 degrees 11 minutes 25 seconds

Size: 110'* Magnitude: 1.2 Class: I 3 r n

North is up

West to the right


 8" f5 Newtonian reflector


 ST-8XME, self-guided, binned 1x1, temp -25c, camera control MaxIm DL 4.56


Lumicon Red filter, 880 minutes (88 x 10 minute subs), 02/13/14/15/16/2012; seeing 2.7-3.6 FWHM per CCDStack


 CCDStack 2.60.4420.19802, Photoshop CS5.1


 Rolling Roof Observatory, Thousand Oaks, CA 91360 (+34d 13m 29s -118h 52m 20s)

Notes:* This image is centered on the 'more interesting' part of the nebulosity of M 45, since the listed size of M 45 is more than three times the size of my imaging field ... although there is not much red in this part of the nebulous field. According to "Star Clusters", by Brent Archinal and Steven Hynes, M 45 (the open cluster) is centered on Alcycone, the bright star at the east (left) of this field. The top of the' Merope Nebula' (NGC 1432/1435) is at the bottom center.

From the NGC / IC Project:

Contemporary/Current Data for Melotte 22 = M 45

Right Ascension (2000):  03h 47m 28s Declination (2000):  24º 06' 18" Object Type:  Open cluster Object Classification:  Class C Constellation:  Taurus Position Angle:  -----  °Visual Magnitude:  ------ Surface Brightness:  ---- Blue Magnitude:  ------ Object Size:  90'X90' Also Cataloged As:  M 45, PLEIADES Catalogue Notes: