Observation by Richard Sargent: Animation of Hind's Variable Nebula NGC ...

Uploaded by

Richard Sargent

Observer

Richard Sargent

Observed

2023 Jan 21 - 21:49

Uploaded

2023 Jan 25 - 00:09

Objects

NGC1555

Equipment

C14 at f7 and Atik 460EX camera

Exposure

58 x 1 minute exposures

Target name

Hind's Variable Nebula NGC 1555

Title

Animation of Hind's Variable Nebula NGC 1555

About this image

The images above are cropped from images made on 15th December 2022 and 21st January 2023. In the December image I was struck by the prominent dark 'shadow' running from NE to SW across the nebula (I put an arrow to highlight it). It's like a veil in that one can still see features behind it that are brighter above and below the 'veil'. This has been there for some time previous. The January 21st image looks a bit different and I've made the animation above to show the change. In my imagination it looks like the 'veil' has broadened to the south and features are not so visible through it. However it surely can't be a material cloud that's moving as it couldn't move so far in a short space of time. So presumably it's actually a shadow cast by material moving in front of T Tauri. Who knows, I don't!

Files associated with this observation

Image7_pipp.gif (856.9 kB)

Like this image

Mike Harlow, Grant Privett, Dean Norris, Mark Phillips, Graham Winstanley, David Basey, Hugh Allen, Jeremy Shears, Manolo_Rodriguez, Callum Potter, Robin Leadbeater

Comments

Grant Privett, 2023 Jan 25 - 20:24 UTC

Thats a nice piece of work.

As you say, at that distance from T Tau, a material object would be moving pretty fast, so I reckon your shadow puppets idea is right.

I vaguely recall it being suggested that T Tau's polar axis was mainly toward us ie perpendicular to the plane of the sky so it possible the shadow is being cast by some lump on the accretion disc, close into the star.

It will be interesting to see how this develops and whether these feature changes repeat.

Richard Sargent

Copyright of all images and other observations submitted to the BAA remains with the owner of the work. Reproduction of work by third parties is expressly forbidden without the consent of the copyright holder. By submitting images to this online gallery, you grant the BAA permission to reproduce them in any of our publications.

Registered charity no. 210769
Registered company no. 117572

For more information including contact details, click here.

Our Terms of Use are here.

Our Privacy Policy is here.