Menzel 1

Menzel 1

Bipolar Planetary Nebula in Norma

Constellation: Norma
Ra: 15h 34m 18s
Dec: -59d 09m 00s
Distance: 3,400 light years
Image Size: 11.7' x 11.7'
North: Up; East Right



Menzel 1 (PLN 322-2.1, ESO 135-11) is a small (1.2′ x 0.5′), bright, bipolar planetary nebula in the southern constellation of Norma approximately 3,400 light years distant. Its axis is oriented about 40 degrees to our line-of-sight. The object is suggested to be 4,000 – 10,000 years old. It was discovered by David Howard Menzel in 1922. It has a slightly thinner and brighter “waist” with extensions on both sides, giving it a bipolar shape. Only about 10-20% of planetary nebulae are bipolar. Narrowband oxygen (OIII at 500.7 nm) and hydrogen (H-a + NII at 656.3 nm) filters were used to obtain the emission detail. Shorter exposures using RGB filters were used for star colors. This is a cropped image from the 35′ x 35′ normal size from the system in order to show more detail of this small object.

Exposure: 7.5 hrs Total; 3 hrs H-a and OIII, 1.5 hrs RGB
Telescope: PlaneWave CDK20, 0.5 m f/6.8 0.54 arcsec/pix
Mount: PlaneWave Ascension 200h
Oag: Astrodon MonsterMOAG
Acquisition: ACP-Expert
Calibration: CCDStack2
Observatory Site: iTelescope, Siding Spring, NSW, Australia
Camera: SBIG STX 16803
Filters: Astrodon 5nm H-a, 3nm OIII, Gen 2 RGB
Guider: Starlight Xpress Lodestar
Camera Operation: Maxim 5.24
Processing: Photoshop CC 2019
Image Date: 08/01/2019 - 08/04/2019

Submit a Comment

Your email address will not be published. Required fields are marked *

The reCAPTCHA verification period has expired. Please reload the page.