Celestial hemisphere:  Northern  ·  Constellation: Auriga (Aur)
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Circular Asymetrical Planetary Nebula G1571+044 (IPHAS J051733.3+393027), Jerry Yesavage
Circular Asymetrical Planetary Nebula G1571+044 (IPHAS J051733.3+393027), Jerry Yesavage

Circular Asymetrical Planetary Nebula G1571+044 (IPHAS J051733.3+393027)

Getting plate-solving status, please wait...
Circular Asymetrical Planetary Nebula G1571+044 (IPHAS J051733.3+393027), Jerry Yesavage
Circular Asymetrical Planetary Nebula G1571+044 (IPHAS J051733.3+393027), Jerry Yesavage

Circular Asymetrical Planetary Nebula G1571+044 (IPHAS J051733.3+393027)

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Description

There do not appear to other versions on Astrobin. Apparently first observed on 9/24/2011.  

I think there is considerable O-III in the center like some of the previous ones.  I am exposing equally H-alpha and O-III on these objects as the published images below do not have O-III and I was  surprised at what showed up in several of these.  This is an act of faith. 

Information for this image is from the Isaac Newton Telescope Photometric Hα Survey of the Northern Galactic plane (IPHAS) PN Catalogue.  IPHAS J051733.3+393027.

It is apparent 91 arcseconds across.  Morphology is "Ra" or Round with Asymmetry.

I believe the imaging and spectroscopy was done at "SM" or San Pedro Martir 2.0m Telescope (SPM) in Mexico with its Boller& Chivens (B&Ch) spectrograph and OS.

Note below the size was based on a 120s H-alpha exposure on a 2m telescope.

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Since I plan to image more of these (there are a lot) here is a table of descriptors from the original paper cited above.

Major and where relevant, minor axis dimensions in arcseconds: the measurement of PNe size was done from the 120 s exposure Hα images so we are limited in description of the exact extent of the nebulae.

Morphological classification: assigned following the ‘ERBIAS’ morphological classifiers to indicate Elliptical, Round, Bipolar, Irregular, Asymmetric or quasi-stellar (unresolved or barely resolved) PNe.

The additional sub-classifiers of ‘amprs’ were also used where evident:

one-sided enhancement/asymmetries denoted with ‘a’

multiple shells or external structure as ‘m’

point symmetry ‘p’

well-defined ring structure or annulus ‘r’

resolved, internal structure as ‘s’.

Telescope and date for first spectroscopic confirmation: a two-letter code is used to identify each telescope used for spectroscopic confirmations as follows:

WH – WHT 4.2 m Intermediate Dispersion Spectrograph (IDS) on the 2.5 m INT and the spectrograph ISIS on the 4.2 mWilliam Herschel Telescope (WHT) located at the Observatorio del Roque de los Muchachos on La Palma in the Canary Islands

IN – INT 2.5 m

SM – San Pedro Martir 2.0m Telescope (SPM) in Mexico with its Boller& Chivens (B&Ch) spectrograph.

KP – KPNO 2 m

GC – Grantecan 10 m

OS – OSN 1.5 m Observatory of Sierra Nevada (OSN) in Spain

MS – ANU 2.3 m with DBS

WI – ANU 2.3 m with WiFeS

SA – SAAO 1.9 m

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