Observer: Yann POTHIER (France)
Your skill: advanced (many years) Category: planetary nebula Constellation: LYR
Object data: Vmag=8.8; Bmag=9.7; 83"x59" (88"x63" in IDB, 160"x145" for outer shell); type IV+III; central star of Vmag=14.7; discovered by Darquier in 1779; ELCAT: [OIII, 6+501nm] =18 x [Hbeta, 486nm]. RA/DE: 18h53.56m, +33°01.8' (2000.0) Date and UT of
observation: 08 July 1994, 23h30 UT 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): 4 Moon up (phase?): no Instrument: Coulter
445mm/17.5" F/4.5 Magnification: 45-620x Filters used: OIII
Description: at 45x, already annular; homogeneous ring
at 87x; slight surface brightness
decrease on the WSW and ENE sides of the ring; no central
star but mirrors poorly
collimated and seeing not too good; very bright PN, overexposed
for the eye with OIII
filter; the N part of the ring is brighter with and without
OIII; as on photographs (without the
color); estimated to be 1.2"x0.8" (72"x47") along a ENE-WSW
axis.