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Observation by Peter Goodhew FRAS: The Hairpin and The Orb

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Peter Goodhew FRAS

Observer

Peter Goodhew FRAS

Observed

2021 Oct 19 - 14:33

Uploaded

2021 Oct 20 - 14:36

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Constellation

Aquila

Field centre

RA: 19h28m
Dec: +09°36'
Position angle: +0°52'

Field size

0°18' × 0°12'

Equipment
  • APM TMB LZOS 152 Refractors
  • QSI6120 CCD Cameras
  • 10Micron GM2000 HPS mount
Exposure

42 hours total integration HaOIIILRGB

Location

Fregenal de la Sierra, Spain

Target name

Parsamian 21 and IPHASX J192847.1+093439

Title

The Hairpin and The Orb

About this image

The Hairpin and the Orb.
The hairpin-like object is known as Parsamian 21. It is one of 23 cometary reflection nebulae discovered by the Armenian astronomer Elma Parsamian in 1965.
It surrounds a young low-mass star which is going through the accretion of circumstellar material. It is one of a unique class of pre-main-sequence stars that have undergone a major outburst in optical light during a temporary, but significant increase of mass accretion rate from the circumstellar disk onto the protostar. These stars are known as FU Orionis objects (FUors). Parsamian 21 is also surrounded by small dark cloud that obscures stars behind it.
The orb-like object is a faint planetary nebula known as IPHASX J192847.1+093439 which consists of two interlocking shells. Most of the detailed structure is visible in the Ha wavelength, whereas the OIII signal is very faint and diffuse. It was independently discovered by French amateur astronomer Laurent Ferrero and is also known as Fe 1. It is 1 arc minute in diameter.
These objects are in the constellation Aquila.
I believe this is the first true-colour image of Fe 1, and the first time that both objects have been photographed together.
Image captured on my remote dual rig at Fregenal de la Sierra in Spain between 8-19 October 2021.
More details at: https://www.imagingdeepspace.com/fe-1.html

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Comments
Grant Privett
Grant Privett, 2021 Oct 22 - 19:11 UTC

Interesting image. I did Parsamian 21 a couple of years back - a comparatively short 40 mins with an 11" - and got a tolerable image of Parsamian 21, but of IPHASX J192847.1+093439  I got nothing. I was observing totally unfiltered and the sky background is massively populated by background stars. Impressive what a difference a H alpha filter makes in scenes like this.

Oddly, once you go deeper the dark area around Parsamian 21 is less obvious.

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