Hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  IC 2574
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Coddington's Nebula, 


Coddington's Nebula
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Coddington's Nebula

Technical card

Imaging telescopes or lenses: GSO RC12

Imaging cameras: Atik 4000

Mounts: Software Bisque Paramount MX

Guiding cameras: Lodestar

Focal reducers: AP CCDT67

Software: PixInsight

Filters: Baader Planetarium B 36mm  ·  Baader Planetarium G 36mm  ·  Baader Planetarium R 36mm  ·  Baader Planetarium L 36mm

Dates:Feb. 25, 2017Feb. 26, 2017Feb. 27, 2017

Baader Planetarium B 36mm: 35x450" bin 2x2
Baader Planetarium G 36mm: 33x450" bin 2x2
Baader Planetarium L 36mm: 71x900" bin 1x1
Baader Planetarium R 36mm: 34x450" bin 2x2

Integration: 30.5 hours

Avg. Moon age: 19.56 days

Avg. Moon phase: 0.83%

Basic astrometry details

Astrometry.net job: 1479123

RA center: 10h 28' 23"

DEC center: +68° 25' 26"

Pixel scale: 0.957 arcsec/pixel

Orientation: 183.534 degrees

Field radius: 0.357 degrees

Resolution: 1900x1900

Locations: Observatorio remoto Tomas Lopez en AstroCamp, Nerpio, Albacete, Spain

Data source: Own remote observatory

Remote source: AstroCamp


IC 2574 discovered by Edwin Coddington in 1898 and classified first as a nebula is actually a dwarf irregular galaxy in the constellation Ursa Major and is part of the M81 group of galaxies. This long exposure image of this classification type SAB(s)m shows two very dim arms and irregular shape. To the north (top left) is an area of massive star formations surrounded by interstellar medium (ISM) and thought to be triggered by the central stellar cluster and because if its large size it is classified as a 'Super Giant Shell' (SGS).
An extract taken from a study by S. Steward & F. Walter 2000: In the standard picture (e.g., Weaver et al. 1977; McKee & Ostriker 1977; Chu et al.1995), these structures are believed to be created by young star-forming regions that supposedly eject a great amount of mechanical energy into the ambient ISM in terms of strong stellar winds and subsequent supernova (SN) explosions.


Sky plot

Sky plot


Coddington's Nebula,