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(IAAC) NGC 6765 - 8" F/10



Observer: Yann POTHIER (France)
Your skill: advanced (many years)
Object: NGC 6765 (PK 062+09.1; M1-68, ARO 185)
Category: planetary nebula
Constellation: LYR
Object data: Vmag=12.9; 38"x38" (83"x39" in IDB); type V; central star of
Vmag=16:; discovered  by Marth, as a PN by Minkowski in 1946; ELCAT: [OIII,
496+501nm] = 21 x [Hbeta, 486nm].
RA/DE: 19h11.14m, +3033.0' (2000.0)
Date and UT of observation: 21 July 1993, 22h30UT
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: 145x
Filters used: OIII

Description: at 145x, small to medium sized PN (about 30" in diam.
estimated on drawing), faint or very faint, only visible with averted
vision; round, brighter towards the center, with ill defined edges; better
seen with OIII, a little larger (about 35"); already seen at 87x with OIII;
a mag14 star is 50" from the WNW border; a mag12 star is 1.1' to the ESE; a
mag10 star is 3.0' to the W.

I can provide a scanned drawing of NGC 6742 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
yann.pothier@fnac.net
http://www.astrosurf.org/cielextreme
http://www.astrosurf.com/cielextreme
http://astrosurf.org/skylink/publi/cielextreme,


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