(IAAC) NGC 2346 - 8" F/10

Observer: Yann POTHIER (France)
Your skill: advanced (many years)
Object: NGC 2346 (PK 215+03.1; PN G215.6+03.6; ARO 80; M 1-10, Sa 2-5)
Category: planetary nebula
Constellation: MON
Object data: Vmag=11.6; 60x60"; type IIIb+VI; central star V651 Mon of
Vmag=11.16-13.40 (period= 17.2 days); discovered by Herschel in 1785;
ELCAT: [OIII, 496+501nm] = 13 x [Hbeta, 486nm].
RA/DE: 07h09.38m, -0048.5' (2000.0)
Date and UT of observation: 26-27 December 1991, ...
Location & latitude: La Clapiere Obs. (France, latN44 40 00, longE06 27 36)
Site classification: rural, alt.1650m (5500ft)
Limiting magnitude (visual in UMi): 5.6
Transparency (1 to 5 - best to worst): 2
Seeing (1 to 5 - best to worst): 3
Moon up (phase?): no
Instrument: Meade SCT 8" (203mm), F/10
Magnification: 87-145x
Filters used: prism
Description: at 87x, obvious central star of mag11 surrounded by a weak
nebulous halo, faint and small; slightly better seen at 145x; at 80x with
prism, the central star has a strange spectrum, shortened with some
emission lines.
Yann Pothier
11 impasse Canart, 75012 PARIS, FRANCE
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