Observer: Yann POTHIER (France)
Your skill: advanced (many years) Category: planetary nebula Constellation: OPH Object data:
Vmag=11.5; Bmag=10.8; 19"x11" (32"x27" in IDB); type III+II; central star of Vmag=12.8; discovered by
Tempel in ???? (as a PN by Pickering in 1882); ELCAT: [OIII, 496+501nm] = 16 x[Hbeta, 486nm].
RA/DE: 17h14.1m, -12°55.0' (2000.0) Date and UT of observation: 18 February 1994, 05h30 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): 3 Moon up (phase?): no Instrument: Coulter 445mm/17.5" F/4.5
Magnification: 312x Filters used: OIII
Description: at 312x, small PN, bright; elongated NNW-SSE, about 30"x19", rugby-ball shaped; the NNW
half is the brightest part of the nebula; mag12 star 12" from the NNW border; this nebula responds very
well to OIII filter.