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(IAAC) M 76 (NGC 650, NGC 651) - 4.25" F/7.8
Observer: Yann POTHIER (France)
Your skill: advanced (many years)
Object: M 76, NGC 650-651 (PK 130-10.1; PN G130.9-10.5; ARO 2)
Category: planetary nebula
Constellation: PER
Object data: Vmag=10.1; Bmag=12.2; 87"x42" [193x118" in IDB]; type III+VI;
central star of Vmag=15.6; discovered by Méchain in 1780; ELCAT: [OIII,
496+501nm] = 16 x [Hbeta, 486nm].
RA/DE: 01h42.30m, +51°34.7' (2000.0)
Date and UT of observation: 10 July 1989
Location & latitude: La Clapiere Obs. (France, latN44 40 00, longE06 27 36)
Site classification: rural, alt.1650m (5500ft)
Limiting magnitude (visual in UMi): -
Transparency (1 to 5 - best to worst): 2
Seeing (1 to 5 - best to worst): 3
Moon up (phase?): no
Instrument: Japanese 4.25" (114mm) F/7.8
Magnification: 36-72x
Filters used: -
Description: at 36x, nebulous patch, elongated, above a bright star
(mag7-8); at 72x, well seen, elongated but homogeneous; above 150x, becomes
too faint.
Yann Pothier
11 impasse Canart, 75012 PARIS, FRANCE
yann.pothier@fnac.net
http://www.astrosurf.org/cielextreme
http://www.astrosurf.com/cielextreme
http://astrosurf.org/skylink/publi/cielextreme,
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