2003 Feb: Three winter
PNe ie IC 2165 [CMa @ -13o Dec], NGC 2022 [Ori] and Eskimo [Gem].
Other VS stars etc during observing sessions
here.
2002 July 18/19/25: A
productive week of elusive summer PNe spectra some through haze with a
lvm 2 but CCDs
punch through the most demanding skies!
2000 June 11: Very poor conditions - strong cirrus + gibbous moon; lvm ~2.5 but this starlike PNe PK82+11.1 = NGC 6833 in Cygnus recorded. Sky Cat 2000 quotes RA 19h 49.7m; Dec +48o 58'; 1"diam; m[pg]13.8. The spectra seems classic i.e. unresolved duo of OIII ~500nm dominates with Ha strong and Hb abutting OIII distinct plus very weak line[s] in violet in this spectrum with red to the left.
1999 Aug 19: amongst the brightest of planetaries - the Blue Snowball [NGC 7662] targeted in And. At the Ewell AS next evening it appears a vivid blue non-stellar disk through a member's Meade 9cm ETX/EC [nice 'scope]. A reworked spectrum via the OG prism is included.
1999 June 24/25 - M57 captured during stellar spectra session in Lyra plus my favourite near stellar PNe in adjacent Hercules.
Sky Cat 2000 quotes [p312] PK51+9.1 @ RA18h 49.7' Dec+20o 51'; Her; 3" diam; m[pg] 12.2; central star mv13? WR spect; dist 1.3kpc
Hu2-1 51+09 1 VV208 or
VV458,
Type III PN MD92. Star-like PN extract from ELCAT
PNe complete list
Hu2-1 51+09 1 IRAS18476+2047
NOS4_2. Relatively low-excit PN
Hu2-1 51+09 1 G51.4+9.6
LU4_2. Compact PN KA93.
The following near 'stellar' PNe spectra captured Aug/Sept'98
via 30cm SCT+Mk1a (dv-prism) spectroscope working @ f/3.5 i.e. 1m focal
length. The ratio of OIII (oxygen), hydrogen and helium emission lines
remain similar throughout the series. Campbell's Star [not shown] is the
exception - lines positions normally allocated to hydrogen are attributed
to ionised helium - He I as for WR stars - planetary stellar core [if recorded]
have typically WR spectra.
text & images copyright - Maurice Gavin - WPO 1998 -2003