NGC 2736, also known as the Pencil Nebula, is a fascinating object located in the southern constellation of Vela, approximately 800 light-years away from Earth.

It is a part of the larger Vela Supernova Remnant, which was formed by a massive stellar explosion that occurred around 11,000 years ago.

The Pencil Nebula is a type of nebula called a filamentary or linear nebula, it is about 5 light-years long, but its width is only about 0.3 light-years. The Pencil Nebula is primarily composed of ionised oxygen gas but there are also a fair amount of hydrogen (Red) and sulphur (purple) present.

The origin of the Pencil Nebula is not entirely clear. Some astronomers believe it was formed by a shock wave from the supernova explosion that created the Vela Supernova Remnant, while others suggest that it was formed by a separate, more recent supernova.

Dates: 2 Feb 2023 · 4 Feb 2023 · 5 Feb 2023 · 6 Feb 2023


Antlia 3nm Narrowband H-alpha 1.25″: 59×600″(9h 50′)

Antlia 3nm Narrowband Oxygen III 1.25″: 73×600″(12h 10′)

Antlia 3nm Narrowband Sulfur II 1.25″: 40×600″(6h 40′)

Antlia Blue Pro: 30×45″(22′ 30″)

Antlia Green Pro: 30×45″(22′ 30″)

Antlia Red Pro: 30×45″(22′ 30″)

Integration: 29h 47′ 30″

RA center: 08h58m39s.17

DEC center: -45°5816.0

Pixel scale: 1.047 arcsec/pixel

Orientation: 137.344 degrees

Field radius: 0.801 degrees

Resolution: 4449×3241

Locations: Bentleigh, Victoria, Australia

Sky Plot