(IAAC) LKHA 233 / GN 22.32.5 - Newtonian 17.5" (445mm) F/4.5

[Yann POTHIER]

Observer: Yann POTHIER (France)
Your skill: advanced (many years)
Object: LKHA 233 / GN 22.32.5
Category: cometary nebula
Constellation: LAC
Object data: phot.bright.=6/6, 150"
RA/DE: 22h34m41.12s, +40°40'06" (2000.0)
Date and UT of observation: 11 august 2007, 01h50 UT
Location & latitude: La Clapiere Obs. (France, latN44 40 00, longE06 27 36)
Site classification: rural, alt.1650m (5500ft)
Limiting magnitude (visual in UMi): 6.31 (30% of the time)
Transparency (1 to 5 - best to worst): 1
Seeing (1 to 5 - best to worst): 2
Height above horizon: 61°
Moon up (phase?): no
Instrument: Coulter 445mm/17.5" F/4.5
Magnification: 125-426x
Filters used: OIII, UHC, Hbeta

Description: at 271x, small nebula, faint, seen 
about 25% of the observing time at 271x, observed 
from 125 to 426x, irregular shape, somewhat 
cometary with ill defined edges; global elongated 
shape about 1.2'x0.6' NE-SW; brighter central 
part rectangular in shape centered on a mag.13 
star, from which fainter extensions are leaving; 
the larger extension is going SW forming a 
slightly curved tail (concavity towards NW) about 
0.8'x0.3' and its SW end is showing a little 
thicker (these last details, central parts and 
tail, are glimpsed less than 5% of the observing 
time, requiring attention); UHC, OIII and Hbeta 
filter all give a much degraded view of the 
nebula (must be a reflective one); located 3'E 
from SAO 52153 of 8th mag.


-- 

Carpe noctem, Yann.

Yann Pothier
11 impasse Canart, 75012 PARIS, FRANCE
yann.pothier at fnac.net
http://www.astrosurf.com/cielextreme