Observing Report,Planetary Nebula Ngc 6445+Globular Cluster NGC6440
31/08/11
16" F4.5 Newtonion
30mm eyepiece,mag x 60
Bright seems oblong shaped,12.5 mag star N/W 8 mag star S/E
UHC filter Much brighter,and gives some hint of a bipolar nature.
O111 darkens the nebula but the bipolar nature of this object much
more pronunced.
NGC 6440 in same field, Fov 60' small,round, brighter towards the middle,
some of outlying stars resolved.
Nagler 17mm type 4 108xmag
Bipolar nature of the PN plainly seen,O111 splits the two ends cleanly
but the UHC makes the object brighter.
The 8 mag star South East detracts the view and it is best to try and put
it out of the field.
Without a filter this is still a nice object.
NGC 6440 much larger and a greater number of stars ar resolved in the outer
regions but no stars resolved in towards the center.
6mm Radian 304xmag
Quite large with a lot more detail.
UHC gives the best result with the 13.3xmag star at at the South West corner
of the nebula plainly seen
O111 More nebulosity is seen,the nebula is narrower at the northern end but thicker
and broader at the south.
Is very good even without any filters under high mag.
A wonderfull Planetary to observe, takes magnification well
NGC 6440
More stars resolve but none to the core.
It is good when you can get two objects of a different nature in the same field.
Cheers
