(IAAC) Jones-Emberson 1 (JE1, PK 164+31.1, PN G164.8+31.1) - 8" F/10

Observer: Yann POTHIER (France)
Your skill: advanced (many years)
Date and UT of observation: 31 December 1992, about 01h00 UT
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): 2
Moon up (phase?): no
Instrument: Meade 8" (203mm) F/10
Magnification: 145-312x
=46ilters used: OIII
Object: Jones-Emberson 1 (JE1, PK 164+31.1, PN G164.8+31.1)
Category: planetary nebula
Constellation: LYN
Object data: Vmag=3D12.1; dim.7'x6' (410"x365" according to IDB); type IV ;
central star of Vmag=3D16.8; discovered by Jones & al. in 1939
RA/DE: 07h57.8m, +53=B025' (2000); Uranometria 43
Description: at 87x, extremely faint with OIII filter using averted vision,
round and large PN (about 6' in diameter; well seen at 45x and OIII too; a
southern lobe is slightly brighter and the rest is very faint at 145x; a
lot of faint stars mag13-14 are scattered in and near the nebula.
I can provide a scanned drawing of JE1 to anyone who can read the binhex
encoding of Eudora (for Mac); just mail me to try
(ypothier@abi.snv.jussieu.fr), it works sometimes with other
Yann Pothier
11 impasse Canart, 75012 PARIS, FRANCE
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