Hemisphere:  Northern  ·  Constellation: Andromeda (And)  ·  Contains:  NGC 79  ·  NGC 80  ·  NGC 83  ·  NGC 85  ·  NGC 86  ·  NGC 90  ·  NGC 93  ·  NGC 96
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Arp 65 - NGC90/93, 


            Michael Lorenz
Arp 65 - NGC90/93
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Arp 65 - NGC90/93

Technical card

Imaging cameras: Atik 460EX mono

Mounts: Astro-Physics 1100 GTO

Guiding telescopes or lenses: Telescope Engineering Company TEC 140 f/7 APO

Focal reducers: TEC Field Flattener

Software: N.I.N.A.  ·  Pleaides Astrophoto PixInsight

Filters: Baader Planetarium LRGB 1.25"

Accessory: Lacerta Motorfokus  ·  Starlight Xpress Lodestar Autoguider  ·  Atik OAG  ·  ATIK EFW2

Dates:Nov. 7, 2020

Frames: 32x300"

Integration: 2.7 hours

Avg. Moon age: 21.09 days

Avg. Moon phase: 61.12%

Basic astrometry details

Astrometry.net job: 4259020

RA center: 0h 21' 23"

DEC center: +22° 23' 20"

Pixel scale: 0.919 arcsec/pixel

Orientation: 352.386 degrees

Field radius: 0.372 degrees

Resolution: 2229x1871

Locations: Home, Leipzig, Germany

Data source: Backyard


This is Arp 65 or NGC90 interacting with NGC93. NGC90 is the spiral and exibihits heavily distorted spiral arms. NGC93 is tilted more towards our point of view.

Interestingly, both galaxies have a large variing distance between 188 to 480Mly for NGC90 and 192 to 328Mly for NGC93.

This image need more integration time, there is a lot going on in the background of this field. Love it!

Unfortunately, there are some streaks and are larger circular region to the top left appearing darker than the rest of the image, which is due to flats. My camera needed cleaning of the window protecting the CCD chip area and the desiccant needed to be renewed. There was some residue from fogging of the window. All done and I am getting very clean frames again, much easier to work with flats. See my recent images (Holmberg266 for example)