Observation by Peter Goodhew FRAS: StDr 4 - a new discovery

Uploaded by

Peter Goodhew FRAS

Observer

Peter Goodhew FRAS

Observed

2022 Dec 17 - 12:33

Uploaded

2023 Oct 20 - 12:43

Objects

The Elephant Trunk (IC1396)

Equipment

APM TMB LZOS 152 Refractors
QSI6120 CCD Cameras
10Micron GM2000 HPS mount
Celestron C14 EdgeHD
ZWO ASI6200MM Pro
iOpton CEM120

Exposure

57h 40m HaOIIISIIRGB

Location

Fregenal de la Sierra, Spain

Target name

StDr 4

Title

StDr 4 - a new discovery

About this image

NEW DISCOVERY: When we discovered this unusual and interesting nebula with internal apparent bow shock not far from the Elephant Trunk Nebula / IC 1396 in 2019, we initially believed it to be a planetary nebula.
However the absence of a central white dwarf in such a bright object was unusual, even if the bubble-like structure suggested a planetary nebula.
A spectrum made by Pascal le Dû revealed the surprise - an SII signal suggesting shocked gas. What this object is is not yet clear, but another piece of the puzzle is a very clear and strong radio signal identified in the NVSS survey.
The dark radiant bok-globule structures at the top of the image were formed when the bright and hot blue stars in the centre of nearby IC 1396 blew dust and gas outwards with their strong stellar winds.
Data acquisition by Peter Goodhew and Sven Eklund
Image processing by Marcel Drechsler
More information at https://www.imagingdeepspace.com/stdr-4

Files associated with this observation

StDr4 1500.jpg (290.8 kB)

Like this image

Callum Potter, NORMAN GRAY, Graham Winstanley, Tim Haymes, Peter Carson

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