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Monday, 19 April 2010

[BAA 00489] Gyulbudaghian Nebula may be Brightening

BAA electronic bulletin No. 00489   

Gyulbudaghian Nebula may be Brightening

The BAA Deep Sky Section has a programme to monitor the behaviour of variable
nebulae - one of the few classes of deep sky object that actually do anything.
 Gyulbudaghian's Nebula (named after the Soviet astronomer Armen
Gyulbudaghian) is small fan shaped object, associated with the variable star
PV Cephei and looking in many ways like a small version of Hubble's Variable
Nebula. It lies at RA 20h 45m 55s and Dec 67o 57' 45".

This nebula, and PV Cephei, went in a deep fade last year, the nebula becoming
almost invisible on even deep images. PV Cephei has now brightened to around
mag 16.4 (Grant Privett 2010 March 24) and Mike Harlow's latest images (2010
April 14) suggest the nebula itself is also now brightening.

The behaviour of this nebula is not well understood - particularly the rate at
which it brightens from a deep fade.  Can imagers interested in observing it
please monitor it on a regular basis - daily if possible - and ensure that you
image under identical conditions (telescope / cameras / exposure etc) so that
apparent changes in appearance of the nebula are not due to equipment changes.

Please send your observations, both JPG and FITS, along with exposure details
to the Variable Nebula Co-coordinator Grant Privett at
with a copy to the Director Even if you can't see the
nebula in the image please still send your observations in.

If you have any queries regarding the object itself, or imaging it, please
contact Grant.

Stewart Moore
Director - Deep Sky Section

BAA electronic bulletins service.      E-mail:
Bulletin transmitted on Sun Apr 18 10:33:07 BST 2010
(c) 2010 British Astronomical Association
Good Clear Skies
Colin James Watling
Real Astronomer and head of the Comet section for LYRA (Lowestoft and Great Yarmouth Regional Astronomers) also head of K.A.G (Kessingland Astronomy Group) and Navigator (Astrogator) of the Stars (Fieldwork)

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