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Contains:  Benetnasch (ηUMa), M 101, NGC 5457, Part of the constellation Ursa Major (UMa), The star 13Boo, The star 21CVn, The star 24CVn, The star 83UMa, The star Alcor (80UMa), The star Alkaid, The star Mizar (ζUMa), The star ιBoo, The star κ2Boo
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Near-Earth asteroid 2014 JO25, the Whirlpool and the Pinwheel galaxy, 



    
        

            Die Launische Diva
Near-Earth asteroid 2014 JO25, the Whirlpool and the Pinwheel galaxy
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Near-Earth asteroid 2014 JO25, the Whirlpool and the Pinwheel galaxy

Technical card


Dates:April 19, 2017

Frames: 100x60" ISO1600

Integration: 1.7 hours

Darks: ~25

Flats: ~30

Bias: ~30

Avg. Moon age: 22.22 days

Avg. Moon phase: 49.20%

Bortle Dark-Sky Scale: 5.00

Temperature: 18.00


Basic astrometry details

Astrometry.net job: 1666474

RA center: 13h 47' 29"

DEC center: +49° 6' 32"

Pixel scale: 10.395 arcsec/pixel

Orientation: 90.960 degrees

Field radius: 8.825 degrees


Resolution: 5086x3391

Data source: Backyard

Description

On April 19, 2017 the near-Earth asteroid 2014 JO25 approached Earth at a distance of 1.8 million km. This composite image shows the trail of 2014 JO25 in the constellation Canes Venatici. The trail started at 2017-04-19 19:06 UT (left) and ended at 2017-04-19 20:08 UT (right) when the asteroid was at 1.9 million km away from Earth.

The trail consists of 60 x 60 sec frames, while for the background, a total of 100 60 second frames from the same day and from 2017-04-22 were used. The imaging sequence had 2 second intervals thus the trail actually consists of 60 gappy and wiggly (due to my entry-level unguided mount) segments.

What about the distance scales involved in this image? 1.9 million km is 4.9 mean Moon-Earth distances, or 6 light-seconds. When a trail segment ended, the asteroid was already at the next segment! Alkaid, the blue bright star at the center of the field of view is 104 light-years away, while the Pinwheel galaxy is at 21 million light-years and the Whirlpool galaxy at 23 million light-years away! And there are many more small and faraway galaxies in this image! I hope you will enjoy exploring this image at full resolution!

Comments

Author

Die_Launische_Diva
Die Launische Diva
License: None (All rights reserved)
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Revisions

  • Final
    Near-Earth asteroid 2014 JO25, the Whirlpool and the Pinwheel galaxy, 



    
        

            Die Launische Diva
    Original
  • Near-Earth asteroid 2014 JO25, the Whirlpool and the Pinwheel galaxy, 



    
        

            Die Launische Diva
    B

B

Description: Annotated version of the asteroid trail region. Stars of magnitude 10 to11 are shown, while the turquoise blue crosses denote the positions of PGC Catalog galaxies. The asteroid had an magnitude of 10.5 according to Stellarium

Sky plot

Sky plot

Histogram

Near-Earth asteroid 2014 JO25, the Whirlpool and the Pinwheel galaxy, 



    
        

            Die Launische Diva