(IAAC) NGC 1535 - 4.25" F/7.8

Observer: Yann POTHIER (France)
Your skill: advanced (many years)
Object: NGC 1535 (PK 165-15.1; PN G206.4-40.5; ARO 22)
Category: planetary nebula
Constellation: ERI
Object data: Vmag=9.6; Bmag=9.3; 20x17"; type IV+IIc; central star of
Vmag=11.59; discovered by Herschel in 1785; ELCAT: [OIII, 496+501nm] = 16 x
[Hbeta, 486nm].
RA/DE: 04h14.20m, -1244.' (2000.0)
Date and UT of observation: 03 Janvier 1991,
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: Japanese Newtonian 4.25" (114mm), F/7.8
Magnification: 36-150x
Filters used: prism
Description: at 36x, small nebulosity, round and slightly bluish, brighter
center very small which can be mistaken at low power like a central star;
with prism, stellar spectrum; at 150x, quite large nice, brighter to the
center, no central star visible.
Yann Pothier
11 impasse Canart, 75012 PARIS, FRANCE
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