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(IAAC) Obj: Hickson 30 (galaxy group) Inst: 17.5" f/4.4
Observer: Steve Gottlieb
Your skills: Advanced
Date and UT of Observation: 1997-2-8/9, 3:00-9:00 UT
Location: Sierra Nevada foothills, CA USA (37N)
Site classification: rural
Limiting magnitude: 6.5
Seeing: 1"
Moon up: no
Instrument: 17.5" f/4.4 (Dob)
Magnification: 100x, 220x, 280x
Filters used: None
Object: Various Hickson Groups
Category: Compact galaxy groups
Constellation: Eridanus, Orion, Lepus, Cancer, Leo
Description:
These observations were recently made while waiting for Hale-Bopp to rise!
Included are detailed notes of several challenging Hickson groups including
Hickson 30, 31, 32, 34 and 37 and 38. Observing aids included Hickson's
CCD images from the Canada-France-Hawaii telescope, Megastar-generated
finder charts and digitized images downloaded from SkyView.
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Hickson 30a = M+00-12-051
04 36.5 -02 52
17.5:the brightest of three in Hickson 30 appears fairly faint, elongated
5:3 NW-SE, 1.0'x0.6', brighter core. Located 40" NW of a mag 11 star.
Hickson 30b = M+00-12-051 lies 3.6' SE and Hickson 30c 2.2' NE.
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Hickson 30b = M+00-12-054
04 36.3 -02 50
17.5:Hickson 30b appears similar to Hickson 30a = M+00-12-054 located 3.6'
NW (just slightly fainter and similar dimesions). Faint, elongated 5:3
SSW-NNE, 0.9'x0.5'. A mag 12 star lies 1.3' S (nearly collinear with the
major axis). An easy mag 13-14 triple star (separation 15" and 28") lies
2' following.
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Hickson 30c
04 36.4 -02 48
17.5:Hickson 30c was a threshold object at 220x (faintest of three,
although 30d was suspected). No details visible but appeared extremely
small, round, ~10" diameter. Visible with averted vision and concentration
using finder chart ~1/3 of the time. Located 35" E of a mag 14 star and
2.2' NE of Hickson 30a.
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Hickson 30d
04 36.6 -02 51
17.5:Hickson 30d was only suspected a couple of times using the CCD Atlas
image 2' NE of Hickson 30b. Not able to confirm sighting with any
certainty.
-
Steve Gottlieb
Albany, CA
sgottlieb@telis.org