[Prev][Next][Index][Thread][Search][Objects]
(IAAC) Obj: And VI, And VII (Galaxies) - Inst: 20" f/4.5 reflector
Observer: Rich Jakiel
Your skills: Advanced (many years)
Date/time of observation: 1999-11-27?
Location of site: Villa Rica GA USA (Lat 34N, Elev 1100')
Site classification: Rural
Sky darkness: 6.0 <Visual LM>, 17+ <Telescopic LM>
Seeing: Unknown
Moon presence: None - moon not in sky
Instrument: 20" f/4.5 reflector
Magnification: 229x, 260x
Filter(s): None
Object(s): Andromeda VI, Andromeda VII (Galaxies)
Category: External galaxy.
Class: d (dwarf)
Constellation: And
Data: mag 13.3V, 12.9V Size Unknown
Position: 23:51:46 +24:34:57, 23:26:31 +50:41:31
Description:
Last week I tried to observe two dwarf galaxies: Andromeda VI and VII.
Both have been only recently discovered, and there are no visual
observations made (that I've heard of). With our club's 0.5 m f/4.5
reflector, I got mixed results. At this particuar site the Limiting
visual mag is 6.0, telescopic > 17.0.
Main reference: Caldwell (1999) AJ 118, 1230
--
1) And VI
23 51 46.3 +24 34 57; Mv = 13.3 +/- 0.12
(229, 260x) - A very weak glow spotted about 1.5'N of a 10th mag Star. The
main body of the galaxy roughly framed by a several 14- 15th mag stars.
--
2) And VII
23 26 31 +50 41 31; Mv = 12.9 +/- 0.27
(229, 260x) Suspected only, uncertain of 'true detection' due to a
scattering of 11 -14th mag stars on the western limb of the object. The
view seemed more certain at the lower magnification, however the light
scattering from the foreground stars detracted considerable at increased
magnification.
To UNSUBSCRIBE from the 'netastrocatalog' lists, use the Web form at:
http://www.visualdeepsky.org/subscribe.html