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Contains:  IC 1396, The star 13Cep, The star Garnet Star (μCep)
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IC 1396 "Home of the Elephant Trunk"  HSO, 


            Paul Borchardt
IC 1396 "Home of the Elephant Trunk"  HSO

IC 1396 "Home of the Elephant Trunk" HSO

Technical card

Resolution: 4110x3288

Dates:Oct. 23, 2018Nov. 13, 2018

Astronomik Ha 6nm 1.25": 29x300" (gain: 75.00) -15C
Astrodon OIII 1.25 3nm: 30x300" (gain: 75.00) -15C bin 1x1
Astronomik S II 6nm: 32x300" (gain: 75.00) -15C bin 1x1

Integration: 7.6 hours

Darks: ~20

Flats: ~20

Avg. Moon age: 9.54 days

Avg. Moon phase: 64.48% job: 2370514

RA center: 324.933 degrees

DEC center: 57.484 degrees

Pixel scale: 4.031 arcsec/pixel

Orientation: 345.094 degrees

Field radius: 2.947 degrees

Locations: Backyard at home, Brookfield, Wisconsin, United States

Data source: Backyard


I usually see close-ups of the Elephant Trunk, but here's the whole nebula, IC 1396, as taken through my Canon 200mm telephoto. The bright red star at the top of the nebula is refereed to as "Herschel's Garnet Star", is a red supergiant or hypergiant. Mu Cephei is visually nearly 100,000 times brighter than the Sun, with an absolute visual magnitude of −7.6. It is also one of the largest known stars with an estimated radius over 1,000 times that of the sun (R☉), and were it placed in the Sun's position it would reach between the orbit of Jupiter and Saturn.


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Paul Borchardt
License: None (All rights reserved)

Sky plot

Sky plot


IC 1396 "Home of the Elephant Trunk"  HSO, 


            Paul Borchardt

In these public groups

Milwaukee Astronomical Society