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I agreeImaging telescope or lens:Orion Optics UK CT10
Imaging camera:Atik 4000
Mount:Skywatcher AZ EQ6 GT
Guiding telescope or lens:Omegon Modul Finder 50/230
Guiding camera:Lacerta M-Gen
Focal reducer:Tele Vue Parracor 1.15
Software:Pixinsight 1.8, Artemis Capture, Guide 9.0
Filter:Astronomik LRGB 1.25" Type IIc
Accessory:Atik EFW2-1 9x1.25"
Resolution: 1787x1792
Dates:Jan. 30, 2019
Frames:Astronomik LRGB 1.25" Type IIc: 72x180" -25C bin 1x1
Integration: 3.6 hours
Darks: ~20
Flats: ~80
Bias: ~120
Avg. Moon age: 24.66 days
Avg. Moon phase: 24.52%
Astrometry.net job: 2666857
RA center: 205.548 degrees
DEC center: 28.385 degrees
Pixel scale: 1.149 arcsec/pixel
Orientation: 359.027 degrees
Field radius: 0.404 degrees
Locations: Homeobservatory , Roding, Bayern, Germany
Data source: Backyard
Charles Messier entdeckte am 3. Mai 1764 diesen beeindruckenden Kugelsternhaufen im Sternbild Jagdhunde. Mit über 500 000 Sternen gehört er zu den Sternreichsten dieser Art. Sein Gezeiten Durchmesser beträgt 226 Lichtjahre in einer Entfernung von 33900 Lichtjahren. Die Ausdehnung beträgt ca. 18 Bogenminuten. Bisher sind 224 Variable Sterne nachgewiesen. Mit rund 4% an schweren Elementen im Vergleich zur Sonne gilt Messier 3 als sehr metallreich und ist Prototyp dieser Klasse von Kugelsternhaufen.
Charles Messier discovered on 3 May 1764 the impressive globular cluster in the constellation Canes Venatici. With over 500,000 stars, it is one of the star-rich of its species. Its tidal diameter is 226 light-years at a distance of 33900 light-years. The expansion is about 18 arcmin. So far, 224 variable stars have been detected. With around 4% of heavy elements compared to the Sun, Messier 3 is considered to be very metal-rich and is the prototype of this class of globular clusters.
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