(IAAC) IC 4593 - 13" F/3.4

Observer: Yann POTHIER (France)
Your skill: advanced (many years)
Object: IC 4997 (PK 058-10.1; PN G058.3-10.9; ARO 38; He 2-464)
Category: planetary nebula
Constellation: SGE
Object data: Bmag=11.6; 5"x5"; type I; central star of Bmag=13.7;
discovered by Fleming in 1896; ELCAT: [OIII, 496+501nm] = 15 x [Hbeta,
RA/DE: 20h20m05s, +1643.3' (2000.0)
Date and UT of observation: 22 August 1990
Location & latitude: La Clapiere Obs. (France, latN44 40 00, longE06 27 36)
Site classification: rural, alt.1650m (5500ft)
Limiting magnitude (visual in UMi): -
Transparency (1 to 5 - best to worst): 2
Seeing (1 to 5 - best to worst): 3
Moon up (phase?): no
Instrument: Dobsonian diam.312mm/13" - F/3.4
Magnification: 40x
Filters used: prism
Description: at 40x with prism, stellar dot, quite bright, nearle lost in a
dense stellar field.
Yann Pothier
11 impasse Canart, 75012 PARIS, FRANCE
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