New Necklace Nebula

The Necklace nebula

On 2010 November 3th, Astronomy picture of the day displayed a attractive image of a new discovered nebula called Necklace nebula.
All details can be found at:
http://antwrp.gsfc.nasa.gov/apod/ap101103.html

According to me, nobody had published a drawing of it before.
Therefore, some days after, I tried to have a look at it… and I suceeded, more easely than I thought.

Through my T635 mm dobson Obsession with an Ethos 13mm (240x) and, moreover, an extra-thin OIII filter Astrodon with a 5 nanometers band pass, the nebula was supprisingly analysable, magnitude 14 – 15v estimated.
The shape was elongated, a/b about 1.75, and west part was a bit brighter than opposite, but no bright knot could be identified !
My drawing has been carried out, as usual, from a annotated sketch done under the sky, first with pencil and china ink on an A4 white Canson paper, then inverted and improved through Paint Shop Pro.
See details and notes at www.deepsky-drawings.com.

Regards

Bertrand

P.S. Details of observation:

Object name:

IRAS 19417+1701

Object type:

Unknown

Magnitude:

99.99

RA:

19h 44m 29s

Dec:

17° 10′ 49″ N

Constellation:

SGE

Observation details

Date of observation:

04 nov. 2010 19:33 UT

Length of observation:

62 min

Object position:

Alt: 42.5°, Az: 250.3°

Weather conditions:

14h: J+++ V~0 t19° hu52% T2(?) 20h: N++ V0 t11° hu83% QZ(Cyg)21.22 L60°21.20

Observation conditions:

FWMH1.5″ mvl UMi6.4:VI3, 6.6:VI4! T1.5 P2 S2-3/240 5/519 good conditions.

Observing site:

Mas des Gres (Southern French Alps)

Instrument:

TN 635 Dobson Obsession

Main eyepiece:

Televue Ethos 6mm

Barlow:

(None)

Magnification:

519x