Jump to content


CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.


Arp 84 - NGC 5395/94 in Canes Venatici

DSO Observing Report Sketching Visual
  • Please log in to reply
5 replies to this topic

#1 bphaneuf


    Surveyor 1

  • *****
  • topic starter
  • Posts: 1,990
  • Joined: 15 Sep 2021
  • Loc: GHRO: Lat: 34.696; Lon: -80.537

Posted 29 March 2024 - 04:24 PM

NGC 5395 and 5394/Arp 84 – interacting galaxies in Canes Venatici:


Went to this one after a spotty start to the evening.  Working on a longer-term project that didn’t begin well, but now I think I’m properly oriented after a couple hours on it.  Looked away from it for a fresh observation - this one - to get reset.


Arp 84 consists of two spiral galaxies interacting and distorting one another around 160 million light years out.  5395 is much the larger of the two and is nearly face on.  Its smaller companion 5394 is distorting 5395’s core, stretching it out along a north-south axis.  5394’s arms are distorted but curiously show no sign of ongoing star formation.


Observing:  Arp 84 was seen right away as an indistinct smudge that gave away its more detailed shape in exchange for time spent on it.  The object floats in a fairly sparse starfield, with a bright pair to the southwest edge of the FOV and a steady near-threshold star to the south.  Arp 84 was easily held in direct vision, especially the brighter highlights and overall extension and shape.  First seen at 145x with the 21mm, the object seemed to like the higher magnification of 235x with the 13mm.  Details were confirmed by the 8mm at 381x, but nothing more than 235x showed and with seeing being quite poor the image was getting mushy.  The lower magnification also allowed me to sneak the bright pair of stars to the SW into view.


5395 is oriented almost N-S and presents as a 3:1 oval once the fainter portions of the halo were seen.  The core is asymmetrical, appearing as a bright elongated area in the southern half of the halo.  A slightly brighter nucleus occasionally was seen.  The northern half of the halo stretches towards the companion galaxy but doesn’t quite reach it.


5394’s core appeared brighter and more concentrated than that of 5395.  The surrounding halo and faint arms were not immediately apparent but revealed themselves over time and with the usual tricks to stimulate AV.  The arm that serves as a connecting bridge took time to smoke out and was detected as much by the darker area above it as the arm itself.  The other arm to the north of the core was first seen as an amorphous hazy area that later resolved into a curve from the north to nearly west.  Much as with the other arm, its shape was helped by a darker area between it and the core.


With poor seeing this was very much a “trust your eyes” experience and a reward for patience.


Sketching: white pastel pencils and white pastel powder on Bachmore 92 lb. black multimedia paper.    5395’s basic shape was drawn with a #2 Filbert brush.  Everything else was done with the 12/0 mini angular.


NGC 5395-94  Arp 84 in CVn.jpg


Thanks for looking!


Edited by bphaneuf, 29 March 2024 - 10:00 PM.

  • jonbosley, frank5817, KidOrion and 9 others like this

#2 TomC


    Vostok 1

  • -----
  • Posts: 189
  • Joined: 27 Jul 2018
  • Loc: Belgium

Posted 29 March 2024 - 05:09 PM

Splendid observation, you took the time needed to fully appreciate this object.
  • bphaneuf likes this

#3 JMSchwartz


    Viking 1

  • *****
  • Posts: 962
  • Joined: 24 Apr 2017
  • Loc: Simi Valley California 93065

Posted 30 March 2024 - 04:31 PM

B- what a cool galaxy nice work recording this level of detail. 

Cheers Jon 

  • bphaneuf likes this

#4 BrentKnight



  • *****
  • Moderators
  • Posts: 8,412
  • Joined: 29 Dec 2014
  • Loc: Foley, Alabama

Posted 30 March 2024 - 05:49 PM

Excellent observation and sketch.  This one is on my to-be-observed list with the EAA rig - hopefully tonight!

  • bphaneuf likes this

#5 Herodotus


    Viking 1

  • -----
  • Posts: 727
  • Joined: 08 Oct 2021
  • Loc: Fruita, CO B 3/4

Posted 31 March 2024 - 09:26 PM

Very nice!! Great sketch and great notes. Thanks B
  • bphaneuf likes this

#6 niteskystargazer


    Voyager 1

  • *****
  • In Memoriam
  • Posts: 10,414
  • Joined: 05 Oct 2009
  • Loc: 41-43'-28" N 87-42'-39" W

Posted 01 April 2024 - 10:56 AM



Nice sketch of Arp 84 - NGC 5395/94 (In Canes Venatici) smile.gif .




thanx.gif ,



  • bphaneuf likes this

CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.

Recent Topics

Also tagged with one or more of these keywords: DSO, Observing Report, Sketching, Visual

Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics