Ralf Vandebergh

@ralfvandebergh

Astrophotographer. Fully manually tracked spacecraft imaging with backyard equipment. Systematic imaging for industry. Images posted here are mainly free work.

Wittem, The Netherlands
…ndebergh-astrophotography.simpsite.nl/home
Joined May 2009
264 Photos and videos Photos and videos

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  1. Pinned Tweet
    Mar 11

    Set of telescopic images showing in an overview how managed to reduce brightness and visibility of satellites in the parking orbit by changing configuration/attitude over the year 2020. All images taken secondary focus with a 10 inch telescope.

    10 replies 58 retweets 310 likes
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  2. Retweeted
    23 hours ago

    Shortly after launch satellites are visible naked eye. Then within 1 month changes the configuration and suddenly they are a lot fainter. These telescope images of L27 satellites show how the configuration is changed. Full resolution:

    12 retweets 66 likes
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  3. 23 hours ago

    Shortly after launch satellites are visible naked eye. Then within 1 month changes the configuration and suddenly they are a lot fainter. These telescope images of L27 satellites show how the configuration is changed. Full resolution:

    12 retweets 66 likes
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  4. Nov 14

    Full resolution:

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  5. Nov 14

    Corrected (natural) manually tracking error, so speed is now even more accurate)

    5 likes
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  6. Nov 14

    Full resolution:

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  7. Nov 14

    2/2 Note: The movement of the lower satellite tells nothing about its angular speed because it is a movement caused by the manual tracking error that is always there. So only the movement of the upper sat relative to the lower sat counts.

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  8. Nov 14

    Corrected animation speed to more accurate value, closer to the real speed) A rare event to capture 2 satellites in narrow barlowed field of 10 inch telescope. Although these sats orbit probably at different altitudes, it gives an idea of how a near collision would look like 1/2

    3 replies 4 retweets 22 likes
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  9. Nov 13

    The movement of the lower satellite tells nothing about its angular speed because it is a movement caused by the manual tracking error that is always there. So only the movement of the upper sat relative to the lower sat counts

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  10. Nov 13

    Full resolution:

    1 retweet 3 likes
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  11. Nov 13

    On 2021-10-09 captured 2 passing through the narrow barlowed telescope field, actually while tracking the lower satellite. The altitudes of both satellites are very probably different in this case but this may give an idea how a near-collision would look like!

    3 replies 6 retweets 49 likes
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  12. Nov 11

    New light on in-Earth-orbit stuck spacecraft Cosmos-482 by reprocessed images:

    , , and 4 others
    4 replies 23 retweets 111 likes
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  13. Nov 11

    See also:

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  14. Nov 11

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  15. Nov 11

    1972 Venera spacecraft Cosmos-482, piece-E, set of reprocessings of 2014 obs in order to do a new investigation. It's hypothetical but it could be that the undeployed parachute came out of the capsule and we see this as the elongated element attached to the compact bright object!

    3 replies 4 retweets 40 likes
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  16. Nov 10

    Shark-fin is the configuration used by to minimize brightness at higher elevation

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  17. Nov 10

    2615 obs 2021-09-08 provided good view on Solar Array and demo of shark-fin configuration. Upper 4 images show solar array, lower 2 images at higher elevation show only body with solar panels invisible. Images on right are defocussed to show the brightness difference

    1 reply 5 retweets 21 likes
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  18. Oct 29

    A spacecraft launched in 1972, never made it to but got stuck in Earth Orbit. These images taken with a 10 inch telescope show the remnant of the probe. I never stacked the best data of the 2014-06-25 session before, but decided to do that with interesting result.

    3 replies 29 retweets 127 likes
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  19. Oct 8

    More data:

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  20. Oct 8

    Comparison Canadarm2 holding robot seen from the ground and from space. 10 inch telescope, manually tracked, single frame. Note marked visible thickening in arm which is combined spot consisting of small arm-mounted instruments.

    3 replies 6 retweets 58 likes
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  21. Oct 3

    2021-09-25 pass movie. 10 inch telescope, fully manually tracked recording. Better quality:

    1 reply 4 retweets 54 likes
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