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(IAAC) NGC 2371/2 - 8" F/10



Observer: Yann POTHIER (France)
Your skill: advanced (many years)
Object: NGC 2371-2 (PK 189+19.1; PN G189.1+19.8; ARO 45)
Category: planetary nebula
Constellation: GEM
Object data: Vmag=11.2; Bmag=13.0; 54x35"; type IIIa+VI; central star of
Vmag=14.8 (Bmag=12.5); discovered by Herschel in 1785 (as a PN by Pease in
1917); ELCAT: [OIII, 496+501nm] = 9 x [Hbeta, 486nm].
RA/DE: 07h25.60m, +2929.5' (2000.0)
Date and UT of observation: 01 Janvier 1993, 03h30TU
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): 2
Moon up (phase?): no
Instrument: Meade SCT 8" (203mm), F/10
Magnification: 87-145x
Filters used: OIII

Description: at 145x, medium sized PN, medium brightness, elongated
(estimated to be 73"x36") in a NE-SW axis, with two brighter lobes at the
ends; the SW lobe is brighter and contains a mag13 stellar knot (that is
not weakened by the OIII so it's not a star, rather a nebular
condensation); OIII geives an overall good contrast gain and gives a
clearer view, better separating the 2 lobes; no central star; the nebula
forms a triangle with 2 mag10.5 stars 8' to the WNW and SSW; a double of
mag13+14 (20" to the NE) is at 2.2'NW.

I can provide a scanned drawing of NGC 2371-2 (from the 1998 session) to
anyone who can read the binhex encoding of Eudora (for Mac); just mail me
to try (yann.pothier@fnac.net), it works quite often with other
configurations...


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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