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Re: (IAAC) NGC 2440 - 17.5" F/4.5
Hi,
Would you please send images of ngc 2440, and
ngc 2392?
Thanks
Mark
Yann Pothier wrote:
>
> Observer: Yann POTHIER (France)
> Your skill: advanced (many years)
> Object: NGC 2440 (PK 234+02.1; PN G234.8+02.4; ARO 47; Sa 2-14; bat nebula)
> Category: planetary nebula
> Constellation: PUP
> Object data: Vmag=9.4; Bmag=10.8; 54"x22"; type V+III; central star of
> Vmag=18.9; discovered by Herschel in 1790; ELCAT: [OIII, 496+501nm] = 20 x
> [Hbeta, 486nm].
> RA/DE: 07h41.88m, -18°12.5' (2000.0)
> Date and UT of observation: 02 January 1995, 00h30UT
> 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: Coulter 445mm/17.5" F/4.5
> Magnification: 312x
> Filters used: OIII, UHC
>
> Description: at 312x, medium sized PN, very bright, oval SW-NE, about
> 69"x38", with ill defined adges; brighter towards the center, very small
> and bright nucleus (smaller than 8"); a plume or elongated extension leaves
> the nucleus in a ENE direction (28"x9"); UHC provides a good contrast gain
> and OIII a very good one; at low powers, a bluish tint is obvious; a mag14
> star is 20" from the S edge; a mag8.5 star is 4' to the E.
>
> I can provide a scanned drawing of NGC 2440 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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