(IAAC) NGC 6543 - 8" F/10

Observer: Yann POTHIER (France)
Your skill: advanced (many years)
Object: NGC 6543 (PK 096+29.1; PN G096.4+29.9; ARO 6, VV 143)
Category: planetary nebula
Constellation: DRA
Object data: Vmag=8.1; Bmag=8.8; 22"x16"; type IIIa+II; central star of
Vmag=10.9; discovered by Herschel in 1786; ELCAT: [OIII, 496+501nm] = 9 x
[Hbeta, 486nm].
RA/DE: 17h58.58m, +6637.9.0' (2000.0)
Date and UT of observation: 03 July 1992, about 00h00UT
Location & latitude: La Clapiere Obs. (France, latN44 40 00, longE06 27 36)
Site classification: rural, alt.1650m (5500ft)
Limiting magnitude (visual in UMi): 6.0
Transparency (1 to 5 - best to worst): 1
Seeing (1 to 5 - best to worst): 3
Moon up (phase?): no
Instrument: Meade SCT 8"/203mm  f/10
Magnification: 45-312x
Filters used: OIII

Description: at 45x, already detectable with some attention; at 100x,
nebulous star of the same brightness as a mag10 star very near (located
3'WNW); at 145x, oval shape seen, very bright with OIII filter and
homogeneous, no central star seen (without filter) even at 290x; about
26"x20" in a NE-SW axis.

I can provide a scanned drawing of NGC 6543 to anyone who can read the
binhex encoding of Eudora (for Mac); just mail me to try
(yann.pothier@fnac.net), it works quite often with other configurations...

Yann Pothier
11 impasse Canart, 75012 PARIS, FRANCE

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