NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-18 T16:56:58 PDT
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Notes for object IC 4946

6 note(s) found in NED.


1. 1996ApJS..103...81C
Re:[RC2] A2020-44
A2020-44.--IC 4946.

2. 1994CAG1..B...0000S
Re:[RC2] A2020-44
New 5 [in Shapley-Ames Catalog, Harvard Annals 88, 1932]
Sa(s)
(E,I/S,1/4)
CD-1505-S/Br
Aug 4/5, 1980
103aO + GG385
45 min
New 5 has a very small nucleus surrounded
by an internal ring, seen in the insert. The disk
shows a small dust content but is generally
smooth and resembles the lens structures in NGC
5854 and NGC 3301, above. The smooth,
faint-surface-brightness massive arms begin, as in
the aforementioned galaxies, from the edge of the
lens, which in the print is at the distance of the
bright star above the major axis of the lens on the
upper-left side.
The outer envelope beyond the edge of the
lens is a two-armed spiral, which is easily seen if
the print is viewed from a distance. The sense of
the spiral is counterclockwise from the outer tips
moving inward. As with all galaxies in this panel,
these features form the earliest type of smooth
arms in these very early Sa galaxies. The smooth
nature of the arms is a characteristic of the
classification sequence itself. It is not due to
environmental effects such as stripping but is
generic to the sequence (Sandage 1983a;
Kennicutt and Edgar 1986).

3. 1985SGC...C...0000C
Re:[RC2] A2020-44
Plate 5235r
= IC 4946 with IC RA corrected 18 min? (IC description and dec OK).
Overexposed center, very bright lens, smooth arms.

4. 1982ESOU..C...0000L
Re:ESO 202031-4409.5
=ESO 285- G 07
in ESO 285- G 08 group

5. 1976RC2...C...0000d
Re:[RC2] A2020-44
= HA 88.2, "New 5" (Listed as A2021 in RC1).
In group with NGC 6861, NGC 6868, NGC 6870, and others.

6. 1964RC1...C...0000d
Re:[RC1] A2021
= IC 4946
= "New 5"; see HA 88, 2.
Small, bright nucleus.


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