(IAAC) NGC 2452 - 17.5" F/4.5

Observer: Yann POTHIER (France)
Your skill: advanced (many years)
Object: NGC 2452 (PK 243-01.1; PN G243.3-01.0; ARO 93; He 2-4; Sa 2-16)
Category: planetary nebula
Constellation: PUP
Object data: Vmag=12.0; Bmag=12.6; 19"x19"; type IV; central star of
Vmag=16.11; discovered by Herschel in 1837; ELCAT: [OIII, 496+501nm] = 17 x
[Hbeta, 486nm].
RA/DE: 07h47.43m, -2720.1' (2000.0)
Date and UT of observation: 24 December 1997, 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): 2
Seeing (1 to 5 - best to worst): 3.5
Moon up (phase?): no
Instrument: Coulter 445mm/17.5" F/4.5
Magnification: 400x
Filters used: OIII, UHC, Hbeta
Description: at 400x and OIII, small to medium sized PN, medium brightness,
round and homogeneous; estimated diameter of about 29" (on drawing); UHC
has a good contrast gain, OIII a very good one and Hbeta has no effect; the
PN is larger through OIII filter; a mag14 star is just detached form the NW
edge; NGC 2453, an open cluster of 15-20 stars between mag11 and 13 with
one of mag9 against the NW border, stands 9' away.
I can provide a scanned drawing of NGC 2452 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
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