Celestial hemisphere:  Southern  ·  Constellation: Carina (Car)  ·  Contains:  Carina Nebula  ·  NGC 3372  ·  eta Car Nebula
Getting plate-solving status, please wait...
NGC 3372 Eta Carina Nebula in SHO @ 180s on a 5" refractor, Ian Parr
NGC 3372 Eta Carina Nebula in SHO @ 180s on a 5" refractor
Powered byPixInsight

NGC 3372 Eta Carina Nebula in SHO @ 180s on a 5" refractor

Getting plate-solving status, please wait...
NGC 3372 Eta Carina Nebula in SHO @ 180s on a 5" refractor, Ian Parr
NGC 3372 Eta Carina Nebula in SHO @ 180s on a 5" refractor
Powered byPixInsight

NGC 3372 Eta Carina Nebula in SHO @ 180s on a 5" refractor

Equipment

Loading...

Acquisition details

Loading...

Description

Located approximately 8500 light years in Carina resides a spectacularly violent HII region. Nestled in that is second largest star in our galaxy which is destined for a short but furious life.
Actually a double star in an accelerating collapse cycle which, should it go super dooper nova, would be visible in daytime. When the dust settles this region would be be gone. The Carina Nebula is always a visual treat through a big wide field 31 Nagler eyepiece on any instrument and like M17 (The Swan / Omega nebula) can absorb many hours of observation time through a range of filters and apertures. The Homunculus Nebula is truly mind boggling on a good night with a small 3-6mm Nagler Zoom eyepiece on good 20". One night many years ago we were observing it on a 20" at Crago Observatory on Bowen Mountain outside Sydney when a layer of smooth low cloud moved in covering the sky but the 20 was still on the Homunculus at high power. What happened next was other worldly. Rather than extinguishing the object, the view went from very good to sensational as the cloud improved the seeing and also acted as a filter that dramatically improved the dynamic range and the lobes really sprang out.

Of all the objects I have viewed in the Southern Sky, nothing comes close to demonstrating clearly that the dynamic range of the human eye is better than most sensors. The mottled lobs and jets are very distinct, whereas sensors drown them out. Finding a good image of the Homunculus is, or was, not easy. Hubble did a good job. Maybe a web cam on a big dob. Strange that few give it a red hot go on larger instruments. The entire nebula would have looked very different before the Great Eruption in the 1840s surrounded Eta Carinae with dust, drastically reducing the amount of ultraviolet light it put into the nebula. Over the last 20 years Eta Carina has brightened significantly as dust from the 1840's eruption clears and it is now easily visible to the naked eye. 

This view compares the previous result with Red Cat 71's 4 degree FOV with the 127is at 180s seconds exposure. I have a brace of 300s exposures to try next but I doubt it will be much better than the shorter subs (TBC).

Comments

Sky plot

Sky plot

Histogram

NGC 3372 Eta Carina Nebula in SHO @ 180s on a 5" refractor, Ian Parr

In these collections

Nebulae
New