NGC 5746, Galaxy in Virgo: June 2021 Observer’s Galaxy Report #149

Monthly Observer’s Challenge

Compiled by:

Roger Ivester, North Carolina


Sue French, New York

June 2021

NGC 5746, Galaxy in Virgo

Sharing Observations and Bringing Amateur Astronomer’s Together



This month’s target

William Herschel discovered NGC 5746 on 24 February 1786 with his 18.7-inch reflector. His handwritten journal reads:” Extremely bright, much extended in the parallel, 8 or 9 arcminutes long, bright nucleus.”

A recent study by John Kormendy and Ralf Bender in the Astrophysical Journal presents NGC 5746 as a structural analog of our own galaxy. Both are “are giant, SBb–SBbc galaxies with two pseudobulges, i.e., a compact, disky, star-forming pseudobulge embedded in a vertically thick, ‘red and dead,’ boxy pseudobulge that really is a bar seen almost end-on.” According to the authors, the lives of these galaxies have been dominated by minor mergers and bar-driven evolution for most of the history of the universe. They place NGC 5746 at a distance of 26.7 Mpc (87 million light-years).…872..106K/abstract

NGC 5746’s V(V_T) visual magnitude is 10.32 ± 0.13, and its surface brightness is 12.6. The galaxy’s visible extent through medium-size amateur telescopes under dark skies is in the vicinity of 7.4′ × 1.3′.

Roger Ivester: Observer from North Carolina

NGC 5746 – Galaxy in Virgo 

Date:  May 30, 2021

Telescope:  6-inch f/6 Newtonian 

Sketch Eyepieces:  16mm + 1.9x Barlow 

Magnification:  109x

Field of View:  0.60º

Very easy to locate and see using 46x, mostly in-part being only 20 arc minutes West of bright star,  3.7 magnitude 109 Virginis.  

My best view came at 109x, and presenting the galaxy as highly elongated, oriented almost perfectly N-S.  The core is fairly bright and elongated with faint extensions, coming to a point at both the N and S tips.  

For my sketch, I moved 109 Virginis out of the field of view, to reduce the extreme glare.  

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