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Getting plate-solving status, please wait...
LoTr 5, 


            Gary Imm
LoTr 5

LoTr 5

Technical card

Resolution: 2896x2600

Dates:April 21, 2019April 29, 2019May 6, 2019

Astrodon Blue 31mm Gen2 I-Series: 30x60" (gain: 139.00) -20C bin 1x1
Astrodon Green 31mm Gen2 I-Series: 30x60" (gain: 139.00) -20C bin 1x1
Astrodon Ha 31mm 5nm: 30x300" (gain: 300.00) -20C bin 1x1
Astrodon OIII 31mm 3nm: 30x300" (gain: 300.00) -20C bin 1x1
Astrodon Red 31mm Gen2 I-Series: 30x60" (gain: 139.00) -20C bin 1x1

Integration: 6.5 hours

Avg. Moon age: 14.31 days

Avg. Moon phase: 41.34% job: 2704013

RA center: 193.891 degrees

DEC center: 25.891 degrees

Pixel scale: 0.782 arcsec/pixel

Orientation: 172.462 degrees

Field radius: 0.423 degrees

Locations: Backyard (Mag 20.8 - New Moon), Onalaska, Texas, United States

Data source: Backyard


This object is a large, faint planetary nebula located 1600 light years away in the constellation of Coma Berenices. It was discovered in 1980 by Longmore and Tritton and is the highest galactic latitude planetary nebula (+88 degrees).

The nebula is about 11 arc-minutes in diameter in our apparent view. By my calculation, it is about 5 light years in true diameter.

The shape of the nebula appears to be a bi-polar lobal shape, seen almost end-on from our apparent view. Two superimposed circular shapes can be identified. I don't understand why so few planetary nebula have this apparent "dual circle" shape, when the bi-polar type of structure is so common.

The signal is almost all OIII. The bright 8.8 magnitude central star is apparently the source star, but is much brighter than most other planetary nebula source stars I have seen and looks more like a foreground star to me.



Gary Imm
License: None (All rights reserved)

Sky plot

Sky plot


LoTr 5, 


            Gary Imm