Archive for July 2018

M51 and Companion Galaxy NGC 5195 – June 2018 Observer’s Challenge Report

July 12, 2018

JUNE 2018 OBSERVERS CHALLENGE – M-051

Observing notes: 

Messier 51 is visible along with companion NGC-5195 in a 60mm (2.4-inch) refractor.  M51 was mostly round with a bright stellar nucleus and a very faint halo.  The small companion galaxy, NGC-5195, just to the north was very faint and small.  If sky conditions are poor, this galaxy pair can be extremely difficult to see using a telescope this small.

In a 10-inch reflector on an exceptional night at 190X, spiral structure was easily visible.  I could trace the prominent eastern arm almost in contact with companion galaxy, NGC-5195.  The nuclei of both NGC-5194 and NGC-5195 were both stellar, with the smaller galaxy, 5195, having a brighter, more intense nuclei.  M51 had a mag. 13.5 star a couple of minutes to the SW of the core, still within the halo, and a mag. 14 star, (requiring averted vision to see) just off to the east, but outside of the halo.

One of my most memorable views of NGC-5194 and NGC-5195 came during an early spring night in 1993, using a 14.5-inch reflector.  The connecting arm of M51 (NGC-5194) was incredible and it reached far out toward the companion galaxy to the north.  This view rivaled that of many photographs.

On the night of April 14, 1994, supernova 1994I was visible.  I estimated the mag. of the SN on that night at 13.8.  The following pencil sketch was made that night. 

 

Rogers M-051 New a Inverted