(IAAC) NGC 4361 - 8" F/10

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: 02 March 1992, 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): 3
Moon up (phase?): no
Instrument: Meade SCT 8"/203mm  f/10
Magnification: 87-312x
Filters used: OIII
Description: at 87x, medium sized PN, very faint stellar center, very
slight brightness increase towards the center, diffuse edges; quite round
but somewhat elongated E-W; with OIII, just slightly better defined borders.
Yann Pothier
11 impasse Canart, 75012 PARIS, FRANCE
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