(IAAC) NGC 4361 - 4.25" F/7.8

Observer: Yann POTHIER (France)
Your skill: advanced (many years)
Object: NGC 4361 (PK 294+43.1; PN G294.1+43.6; ARO 26, VV 62)
Category: planetary nebula
Constellation: CRV
Object data: Vmag=109.9; Bmag=10.3; 81"x81"; type IIIa+II; central star of
Vmag=12.8; discovered by Herschel in 1785; ELCAT: [OIII, 496+501nm] = 4 x
[Hbeta, 486nm].
RA/DE: 12h24.50m, -1847.6' (2000.0)
Date and UT of observation: 28 December 1990, morning
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): ?
Moon up (phase?): no
Instrument: Japanese Newtonian 4.25"/114mm  f/7.8
Magnification: 36-100x
Filters used: -

Description: at 36x, very small nebulous patch, quite faint with brighter
center; at 72x, slightly brighter extended core, large PN in fact; at 100x,
central star visible but comes and goes with the seeing.

Yann Pothier
11 impasse Canart, 75012 PARIS, FRANCE

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