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(IAAC) Obj: Abell 23 (PK249-5.1, PNG249.3-5.4) - Inst: 25" f/5 dob




[Many thanks to Mike for sharing his log of this little-observed PN!]

Observer: Mike KERR
Your skill: Advanced (many years)
Date and UT of observation: 2003-Feb-27 2200 UT
Location: Ilford, Australia (Lat 33S, Elev 1020m)
Site classification: Rural
Limiting magnitude: 6.3
Seeing (1 to 10): 7
Moon up (phase?): No
Instrument: 25" f/5 dob
Magnification: 200x
Filters used: None, UHC, OIII, H-beta
Object: Abell 23 (PK249-5.1, PNG249.3-5.4)
Category: Planetary nebula
Class: -
Constellation: Puppis
Object data: Size = 54" Vmag = 13.1
RA/DE: 07 43.3 -34 45
Description:
Nothing visible without a filter. There is a slight gain with a UHC
filter, a fair gain with an OIII filter, but no gain with an H-beta
filter. Appears as an extremely faint 0.9' diameter round annular
disk, which is only really seen with averted vision. Two mag 11 stars
are 1.5' W and 1.7' NNE. No central star is seen. It doesn't hold
magnification and is best viewed at 200x with an OIII filter.

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