Hemisphere:  Northern  ·  Contains:  IC 10  ·  IC10
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IC10 - The Starbust Galaxy, 


            Thomas Richter
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IC10 - The Starbust Galaxy

Acquisition type: Electronically-Assisted Astronomy (EAA, e.g. based on a live video feed)

Technical card

Imaging telescopes or lenses: GSO 8" f/5 Newton

Imaging cameras: ZWO ASI 183 MM PRO

Mounts: SkyWatcher NEQ6 Pro Goto

Guiding telescopes or lenses: GSO 8" f/5 Newton

Guiding cameras: Astrolumina Alccd5L-IIc

Focal reducers: Pal Gyulai GPU Aplanatic Koma Korrector 4-element

Software: PhotoShop CS5  ·  PHD2 Guiding  ·  FitsWork 4  ·  DeepSky Stacker Deep Sky Stacker 3.3.4  ·  CCDCiel

Filters: Baader R 1.25'' CCD Filter  ·  Baader B 1.25'' CCD Filter  ·  Baader G 1.25'' CCD Filter  ·  Baader Ha 1.25" 7nm

Accessory: TSOptics TS Off Axis Guider - 9mm

Dates:Sept. 8, 2020Sept. 9, 2020Sept. 14, 2020

Baader B 1.25'' CCD Filter: 42x300" (gain: 53.00) -20C bin 1x1
Baader G 1.25'' CCD Filter: 42x300" (gain: 53.00) -20C bin 1x1
Baader Ha 2" 7nm: 15x600" (gain: 53.00) -20C bin 1x1
Baader R 1.25'' CCD Filter: 42x300" (gain: 53.00) -20C bin 1x1

Integration: 13.0 hours

Darks: ~50

Flats: ~25

Flat darks: ~100

Avg. Moon age: 22.66 days

Avg. Moon phase: 46.13%

Astrometry.net job: 3864468

RA center: 0h 20' 23"

DEC center: +59° 17' 42"

Pixel scale: 0.494 arcsec/pixel

Orientation: -0.073 degrees

Field radius: 0.445 degrees

Resolution: 5397x3589

Locations: Nürnberg, Nürnberg, Bayern, Germany

Data source: Backyard


Object description (wikipedia.org):

IC 10 is an irregular galaxy in the constellation Cassiopeia. It was discovered by Lewis Swift in 1887 and in 1935 Nicholas Mayall became the first to suggest that the object is extragalactic. Edwin Hubble suspected it might belong to the Local Group of galaxies, but its status remained uncertain for decades. The radial velocity of IC 10 was measured in 1962, and it was found to be approaching the Milky Way at approximately 350 km/s, strengthening the evidence for its membership in the Local Group. Its membership in the group was finally confirmed in 1996 by direct measurements of its distance based on observations of Cepheids. Despite its closeness, the galaxy is rather difficult to study because it lies near the plane of the Milky Way and is therefore heavily obscured by interstellar matter.

The apparent distance between IC 10 and the Andromeda Galaxy is about the same as the apparent distance between the Andromeda Galaxy and the Triangulum Galaxy, which suggests that IC 10 may belong to the M31 subgroup.

IC 10 is the only known starburst galaxy in the Local Group of galaxies. It has many more Wolf–Rayet stars per square kiloparsec (5.1 stars/kpc2) than the Large Magellanic Cloud (2.0 stars/kpc2) or the Small Magellanic Cloud (0.9 stars/kpc2). Although the galaxy has a luminosity similar to the SMC, it is considerably smaller. Its higher metallicity compared to the SMC suggests that star formation activity has continued for a longer time period. The evolutionary status of the Wolf–Rayet stars suggests that they all formed in a relatively short timespan. The ratio between the two types of Wolf–Rayet stars (WC stars and WN stars) in IC 10 is very different from the ratio in other galaxies in the Local Group, which may be somehow due to the starburst nature of the galaxy. Currently, the galaxy produces stars at the rate of 0.04–0.08 solar masses per year, which means that the gas supply in the galaxy can last for only a few billion years longer.

Observations of IC 10 in the far-infrared show that the dust in this mild starburst galaxy is deficient in small grains.[6] It is hypothesized that any small grains that formerly existed were destroyed by strong ultraviolet radiation in the areas around the hot luminous stars that were formed in the galaxy's recent burst of star formation.

The galaxy has a huge envelope of hydrogen gas, with an apparent size measuring 68′ × 80′, which is far larger than the apparent size of the galaxy in visible light (5.5′ × 7.0′). IC 10 is also unusual in the respect that the visible part of the galaxy seems to rotate in a different direction than the outer envelope. It has a H II nucleus.



Thomas Richter
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  • IC10 - The Starbust Galaxy, 


            Thomas Richter
  • Final
    IC10 - The Starbust Galaxy, 


            Thomas Richter


Description: corrected orientation

Sky plot

Sky plot


IC10 - The Starbust Galaxy, 


            Thomas Richter