This photo is a stacked image from a video taken in 21-4-2021 about 6.30 utc. Telescope is lunt 50tha ss and camera is zwo asi 178mm. While i was increasing exposure in gimp, i noticed an object in the left of the solar disc which was darker than the prominence. Could you please tell me your opinion about the nature of this object? Thank you in advance. |
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| @Ηρακλής Πιπινος from where was it taken ? If possible with gps coordinates :-)
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Mercury, Venus and Uranus are close to the sun, but not that close. But I found in Stellarium that some « minor planets » / asteroids were close to the sun as well this day, but not at the indicated time, and I doubt they would be visible with that size (Thekla, Hedda). They are 3 to 4 UA far from the sun... they would be very small.
Do you have a non stacked image as well ? Seems the pixels are blown out, and it is really squarish...
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Of course. Image was taken from my backyard, Rhodes island, Greece. The exacoordinates are:36,25,52 N _28,12,42 E.
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Ηρακλής Πιπινος:
Of course. Image was taken from my backyard, Rhodes island, Greece. The exacoordinates are:36,25,52 N _28,12,42 E.
@Ηρακλής Πιπινος I checked from Athen before you answer, but didn’t find any potential celestial body near the sun... checked ISS as well but it was far (distance between Rhode or Athens wouldn’t make such a difference in that case, it was too far away). And with a Lunt 50 it wouldn’t be that big.
I an afraid I don’t know what is was. Maybe check on a single frame, stretching it a bit. It may just be a plane or something in low orbit....
By the way, did you take flats ? It could help : it could be dust, backlit by the all the light that bounce off the Ha filter (most of the energy is reflected in those refractors)
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This is a two layers stacked image , max resolution of asi 178mm sensor.
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Jérémie:
By the way, did you take flats ? It could help : it could be dust, backlit by the all the light that bounce off the Ha filter (most of the energy is reflected in those refractors)
Sorry, no flats.
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Possibly a hot pixel or a weird cosmic ray hit. Gremlins. Check your dark.
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Seems a bit large for a hot pixel, isn’t it ? Cosmic rays would happen only on one frame as well ?
Gremlins is most probable :-)
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 Maybe the death star
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Hi, we see small flares in the sun every day, this could be one of them and there is no secret)
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resolution of asi 178mm sensor.
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