(IAAC) Obj: Abell 194, NGC541 (Arp 133), Minkowski's Object - Inst: 17.5" Newt
Observer: Jeffrey Corder
Your skill: advanced (many years)
Date and UT of observation: Nov 16, 1985
Location & latitude: Lehigh Acres, FL (Lat 26oN, Elev 10m)
Site classification: rural
Limiting Magnitude: Unknown (generally 7.0 or better at site)
Seeing (1 to 10 - 10 best): Unknown
Moon up (phase?): no
Instrument: 17.5" Newt
Filters used: None.
Object: Abell 194, NGC541 (Arp 133), Minkowski's Object
Category: Cluster of galaxies. External galaxy. External galaxy.
Classification: A194: - N541: S0 - Minkowski's Object: P??
Object data: A194: 13.9m, 20' - N541 12.1m, 1.8'x1.7'
Position: 01:25.6 -01:30
Jeff Medkeff asked:
> Can anyone here share an observation of this cluster, particularly with
> respect to identifying the dimmest galaxies visible with a given instrument
> at that time? I have probably one more shot at finishing this sketch before
> the moon gets in the way, and I'd like to cheat off someone else's exam if
> possible to make sure I am mopping everything up properly. The goal here is
> more to test the sketch medium, than to break new observational ground.
Although the above was originally posted a while ago, I thought I would
respond since Lew stated that no one else has done so. Bill Harris did
a nice photograph of this Abell Cluster 194 back in Oct 1989 with an 8"
f/4 Wright Newtonian, I am examining the photograph as I write this.
Jeffrey Corder sent me his Abell Galaxy Cluster Observing Log. He did
a detailed treatment on this cluster, as he did on all the Abell
Clusters he observed.
Looking at Jeffrey's log shows that he observed 21 galaxies in the cluster
with the faintest one he labeled at 15.5 photographic magnitude (ZH 31)
from the Zwicky-Humason identifications. These observations were done
Nov 16, 1985 with a 17.5" Newtonian at 100 power at LeHigh Acres, FL.
Jeffrey did not observe Minkowski's object which is visible on Harris'
photograph, just outside the halo of NGC 541. In fact NGC 541 appears
in Halton Arp's Catalog of Peculiar Galaxies as Arp 133, mainly because
Minkowski's Object (part of the radio source 3C40) is so close. BTW,
Minkowski's Object is NOT plotted on MegaStar.
Minkowski's object is very strange looking on my copy of Dr. Arp's
Atlas. Very contorted looking with a spiral arm that is wrapping itself
around an elongated nucleus. It reminds me visually of the The Spider,
(VV794, UGC5829) in Leo Minor.
Will we ever understand it all?
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