Flare at bottom left corner of M51 Whirlpool Galaxy

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leslie128
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Joined: Sat Mar 05, 2022 5:18 pm
Favourite scope: FRA600
Location: Katong

Flare at bottom left corner of M51 Whirlpool Galaxy

Post by leslie128 »

M51 at Mersing
ASI2600MC Pro, 22 x 120s
30 Apr 2022
I wonder why there is flare/2 rings at the bottom left corner of the photo? It is due to street lights, external factors or due to calibration?
Thx

M51
https://photos.app.goo.gl/BuJiVvF95JVJejty7

M51, Cropped (I have cleaned some of the flare)
https://photos.app.goo.gl/bypJAju1iGJacSwx6
hhzhang
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Re: Flare at bottom left corner of M51 Whirlpool Galaxy

Post by hhzhang »

Could it be flares from distant lights?
rss1234
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Joined: Sat May 22, 2021 1:46 pm
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Re: Flare at bottom left corner of M51 Whirlpool Galaxy

Post by rss1234 »

Looks like light leak from local lights/moonlight
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leslie128
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Joined: Sat Mar 05, 2022 5:18 pm
Favourite scope: FRA600
Location: Katong

Re: Flare at bottom left corner of M51 Whirlpool Galaxy

Post by leslie128 »

hhzhang wrote: Sun May 08, 2022 2:57 pm Could it be flares from distant lights?
Reply from another forum mentioned it was due to reflection inside the telescope from the bright star Alkaid. The solution for some ES users was flocking the inside of the dew/light shield.
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leslie128
Posts: 93
Joined: Sat Mar 05, 2022 5:18 pm
Favourite scope: FRA600
Location: Katong

Re: Flare at bottom left corner of M51 Whirlpool Galaxy

Post by leslie128 »

rss1234 wrote: Sun May 08, 2022 3:36 pm Looks like light leak from local lights/moonlight
Reply from another forum mentioned it was due to reflection inside the telescope from the bright star Alkaid. The solution for some ES users was flocking the inside of the dew/light shield.
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