Object of the Week April 07, 2013 - A whiff of a Planetary: Longmore-Tritton 5

[Uwe Glahn]

Hi Reiner,

fine object that I have to revisit, thanks for the idea.

Under good transparency it was never a problem to see the PN as a very faint glow around the bright CS. I was also of the opinion to see differences within the glow. For me the eastern part was always a bit brighter. But it does not fit perfectly with the pictures.

I remember a lecture of Bernd Gährken about CS in PN for small aperture. Funny, but this CS is one of the few which is visible in binoculars

16", 51x, [OIII], NELM 6m8
LoTr5.jpg

[reiner]

I remember a lecture of Bernd Gährken about CS in PN for small aperture. Funny, but this CS is one of the few which is visible in binoculars

That's the point and this is actually the main difficulty in observing this PN under less than optimal conditions: Separating it from the glow of the CS (not the true progenitor star, which is now a White Dwarf, but its bright G5 companion).

[reiner]

I just noticed that I used the wrong link in my first post. The link goes to the discovery paper by Longmore and Tritton.

The paper about the bipolarity (shown by a spectroscopic analysis of the shells) is here
http://articles.adsabs.harvard.edu/c...NRAS.347.1370G

Here's a figure from the paper showing the two excentric rings due to the bipolar character of the PN.

LoTr5 Bipolarity.jpg