Imaging telescopes or lenses: Teleskop Service ONTC 10" f4 Newton
Imaging cameras: ZWO ASI1600MM Pro
Mounts: Astro-Physics Mach-1 GTO CP4
Guiding telescopes or lenses: Teleskop Service ONTC 10" f4 Newton
Guiding cameras: Starlight Xpress Ultrastar Mono
Software: Photoshop CC · PIXINSIGHT 1.8 · Seqence Generator Pro · PHD2 Guiding PHD2 v2.6.5
Filters: Astrodon Tru-Balance Gen2 E-Series - B 36mm · Astrodon Tru-Balance Gen2 E-Series - G 36mm · Astrodon Tru-Balance Gen2 E-Series - R 36mm · Astrodon Tru-Balance Gen2 E-Series - L 36mm
Accessory: Tele Vue Paracorr Type 2 · QHYCCD QHYCFW3-M
Dates:Jan. 12, 2019 , Jan. 15, 2019 , Jan. 29, 2019 , Feb. 9, 2019 , March 23, 2019 , April 29, 2019
Frames:
Astrodon Tru-Balance Gen2 E-Series - B 36mm: 157x60" (gain: 76.00) -20C bin 1x1
Astrodon Tru-Balance Gen2 E-Series - G 36mm: 172x60" (gain: 76.00) -20C bin 1x1
Astrodon Tru-Balance Gen2 E-Series - L 36mm: 276x30" (gain: 76.00) -20C bin 1x1
Astrodon Tru-Balance Gen2 E-Series - L 36mm: 70x45" (gain: 76.00) -20C bin 1x1
Astrodon Tru-Balance Gen2 E-Series - R 36mm: 125x60" (gain: 76.00) -20C bin 1x1
Astrodon Narrowband 3nm Ha: 38x480" (gain: 139.00) -20C bin 1x1
Integration: 15.8 hours
Darks: ~50
Flats: ~20
Flat darks: ~50
Bias: ~100
Avg. Moon age: 14.02 days
Avg. Moon phase: 44.29%
Bortle Dark-Sky Scale: 5.00
Astrometry.net job: 2692130
RA center: 13h 29' 53"
DEC center: +47° 12' 36"
Pixel scale: 0.685 arcsec/pixel
Orientation: 262.528 degrees
Field radius: 0.289 degrees
Resolution: 2369x1896
Locations: Home Observatory, Schenectady, New York, United States
Data source: Backyard
The Whirlpool Galaxy (M 51) is an interacting grand-design spiral galaxy. Its smaller companion is galaxy NGC 5195 and the pair lies in the constellation of Canes Venatici, close to the border with Ursa Major. Its distance is estimated to be between 15 and 35 million light-years.
It was discovered by Charles Messier in 1773 but it was William Parsons in 1845 who discovered that the Whirlpool had a spiral structure. It was only with Edwin Hubble's work on Cepheid variables that it was recognized that objects such as the Whirlpool Galaxy were much further away than the boundary of the Milky Way and had to be galaxies of their own.
Camera: ZWO ASI1600MM Pro (Gain 76, Offset 30 for LRGB, Gain 139, Offset 50 for Ha)
A: Minimally cropped field of view with TS ONTC 10in f4 and ASI1600 sensor.
B: Cropped field of view around M51.
C: Annotated field of view including galaxies in the PGC catalog. The magnitude of some of these galaxies is in the 18 to 20 range (depending on the band).
D: Tight crop of M51 with transient bright object AT2019abn (a so-called supernova impostor, see https://wis-tns.weizmann.ac.il/object/2019abn).
Description: Crop around M51.
Uploaded: ...
Description: Annotated image with galaxies in the PGC catalog.
Uploaded: ...
Description: Transient bright object AT2019abn (supernova impostor) in M51 in January and February 2019.
Uploaded: ...
| Northeast Imagers |
| Cloudy Nights |
| ZWO ASI1600MM/QHY163M |
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