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(IAAC) NGC 6781 - 4.25" F/7.8



Observer: Yann POTHIER (France)
Your skill: advanced (many years)
Object: NGC 6781 (PK 041-02.1; PN G041.8-02.9; ARO 32)
Category: planetary nebula
Constellation: AQL
Object data: Vmag=11.4; Bmag=11.8; >109"; type IIIB+III; central star of
Vmag=16.2; discovered by Herschel in 1830; ELCAT: [OIII, 496+501nm] = 13 x
[Hbeta, 486nm].
RA/DE: 19h18.44m, +0632.5' (2000.0)
Date and UT of observation: 08 July 1989, evening
Location & latitude: Bucher Mountain (France, latN44 40:, longE06 28:)
Site classification: rural, alt.2350m (7100ft)
Limiting magnitude (visual in UMi): 6.0
Transparency (1 to 5 - best to worst): 1
Seeing (1 to 5 - best to worst): ?
Moon up (phase?): no
Instrument: Japanese Newtonian 4.25"/114mm  f/7.8
Magnification: 36-180x
Filters used: -

Description: at 36x, fuzzy and very faint nebula, ill-defined; at 72x,
better contrast but still very hazy.


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


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