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(IAAC) Hu 1-2 (PK 86-8 1; PNG086.5-08.8) - 8" F/10



Observer: Yann POTHIER (France)
Your skill: advanced (many years)
Date and UT of observation: 23 July 1993, about 02h30 UT
Location & latitude: La Clapiere Obs. (France, latN44 40 00, longE06 27 36)
Site classification: rural, alt.1650m (5500ft)
Limiting magnitude (visual in UMi): 6.4
Transparency (1 to 5 - best to worst): 1
Seeing (1 to 5 - best to worst): 2
Moon up (phase?): no
Instrument: Meade 8"/203mm F/10
Magnification: 145-312x
=46ilters used: UHC
Object: Hu 1-2 (PK 86-8 1; PNG086.5-08.8)
Category: planetary nebula
Constellation: CYG
Object data: Vmag=3D12.0; dim.10"x7" (40"x18" according to IDB); central sta=
r
of Vmag=3D16.1; discovered by Humason in 1921; ELCAT: OIII [496+501nm]=3D 11=
 x
Hbeta [486nm]
RA/DE: 21h33.1m, +39=B038' (2000); Uranometria 86; corrected thanks to Guide
at 21h33m08s, +39=B038'10";
Description: at 145x, small nebulous star of about mag.11; found at that
power with UHC beeing of a slight help; fuzzier at 312x, shapeless with a
quasi-stellar nucleus much brighter; about 16" in diam.; two mag14 stars at
30"SSE and 55"W.
NOTE: this nebula looks bipolar (like M27) on intensified images
(1sec.exposure) obtained with a 24", so 10-16" scopes should visually show
this feature...
I can provide a scanned drawing of Hu 1-2 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
configurations...
Yann Pothier
11 impasse Canart, 75012 PARIS, FRANCE
ypothier@abi.snv.jussieu.fr
ypothier@closun.snv.jussieu.fr
http://www.astrosurf.org/cielextreme
http://www.astrosurf.com/cielextreme
http://astrosurf.org/skylink/publi/cielextreme,
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