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Contains:  NGC 40
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NGC 40, The Bow-tie Nebula, 


            Steven Bellavia
NGC 40, The Bow-tie Nebula
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NGC 40, The Bow-tie Nebula

Technical card

Imaging telescopes or lenses: Bellavia Mini 114mm f/4 Newtonian astrograph

Imaging cameras: ASI224MC

Mounts: Celestron AVX Mount

Software: SharpCap Pro 3.1

Filters: L

Dates:Aug. 10, 2018

Frames:L: 152x10" (gain: 200.00) bin 1x1

Integration: 0.4 hours

Darks: ~20

Avg. Moon age: 28.46 days

Avg. Moon phase: 1.28%

Bortle Dark-Sky Scale: 3.00

Temperature: 20.00

Basic astrometry details job: 2194408

RA center: 0h 13' 0"

DEC center: +72° 31' 19"

Pixel scale: 1.720 arcsec/pixel

Orientation: 291.904 degrees

Field radius: 0.307 degrees

Resolution: 1068x712

Data source: Traveller


NGC 40, the Bow-Tie Nebula, Caldwell 2, is a planetary nebula discovered by William Herschel on November 25, 1788, and is composed of hot gas around a dying star. The star has ejected its outer layer which has left behind a smaller, hot star with a temperature on the surface of about 50,000 degrees Celsius. Radiation from the star causes the shed outer layer to heat to about 10,000 degrees Celsius,[ and is about one light-year across. About 30,000 years from now, scientists theorize that NGC 40 will fade away, leaving only a white dwarf star approximately the size of Earth.



Steven Bellavia
License: None (All rights reserved)

Sky plot

Sky plot


NGC 40, The Bow-tie Nebula, 


            Steven Bellavia