Hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)  ·  Contains:  IC 1795  ·  IC 1805  ·  IC1795  ·  IC1805  ·  IC1824  ·  NGC 1027  ·  NGC 896  ·  NGC1027  ·  NGC896  ·  Sh2-190
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            Joey Troy
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            Joey Troy
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Technical card

Imaging telescopes or lenses: William Optics Redcat 51

Imaging cameras: ZWO ASI533MC Pro

Mounts: Sky-Watcher EQM 35 Pro

Guiding telescopes or lenses: ZWO 30mm f/4 Mini Guide Scope

Guiding cameras: ZWO ASI 120 Mini Mono

Software: Pixinsight

Filters: Optolong L-eXtreme 2"

Accessory: ZWO ASI Air Pro

Dates:Feb. 7, 2021

Frames:Optolong L-eXtreme 2": 6x600" (1h) (gain: 101.00) -10C

Integration: 1h

Darks: ~10

Flats: ~10

Bias: ~10

Avg. Moon age: 25.09 days

Avg. Moon phase: 20.68%

Bortle Dark-Sky Scale: 3.00

Mean FWHM: 5.73

Astrometry.net job: 4215266

RA center: 2h 33' 34"

DEC center: +61° 29' 51"

Pixel scale: 1.573 arcsec/pixel

Orientation: 81.170 degrees

Field radius: 1.751 degrees

Resolution: 5656x5672

Locations: Backyard, Belen, NM, United States

Data source: Backyard


The Heart Nebula, IC 1805, Sharpless 2-190, lies some 7500 light years away from Earth and is located in the Perseus Arm of the Galaxy in the constellation Cassiopeia. It was discovered by William Herschel on 3 November 1787. It is an emission nebula showing glowing ionized hydrogen gas and darker dust lanes.

The brightest part of the nebula (a knot at its western edge) is separately classified as NGC 896, because it was the first part of the nebula to be discovered. The nebula's intense red output and its morphology are driven by the radiation emanating from a small group of stars near the nebula's center. This open cluster of stars, known as Collinder 26 or Melotte 15, contains a few bright stars nearly 50 times the mass of our Sun, and many more dim stars that are only a fraction of our Sun's mass.


Sky plot

Sky plot




            Joey Troy