All Images Copyright Rod Gallagher                                      Click on image to see full size

NGC 3917 -- Spiral Galaxy

Object

Type

Spiral Galaxy

Constellation

Ursa Major

Distance

53.3M light years

Magnitude

12.5

Size

4.61x1.03 arc-min

Notes

NGC 3931 is the Elliptical Galaxy to the lower right of NGC 3917

Image

Date

2012-04-19

Place

Texas Star Party

Exposure Data

C 30 mins @ -15C

C 6x5

Notes

All filters binned 2x2

Equipment

Optics

Takahashi TOA-150

Focal Length

1100 mm @f/7.3

Mount

Paramount ME

Camera

SBIG ST-10XME

Focuser

RoboFocus

Filters

CFW-10, AstroDon CRGB

Software

TheSky6, CCDSoft, CCDAutopilot4, CCDStack 2+, PixInsight, PhotoShop CS6

Reprocessed on 07/04/2023