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The partial solar eclipse from the Netherlands on 10 June 2021


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Today we were lucky to have splendid weather with good seeing and transparency. The observatory was running smoothly, with all four scopes pointed at the Sun:

- Lunt LS80THA collecting H-alpha data every 5 minutes for 30s (2200 frames);
- SkyWatcher Esprit 150ED with Baader ND5.0 foild collecting white-light data every 5 minutes for 20s (250 frames);
- Celestron C11 EdgeHD with Baader ND5.0 foil filter and polarising eyepiece/diagonal-filter in combination with TeleVue Panoptic 41mm for observing;
- Galilean type telescope with sketchboard for projection.

Using the two imaging scopes I managed to collect 306Gb of data in three hours time. The H-alpha part has now been processed in IMPPG in inverted mode:

Sun210610_animation.gif.a6677472b76562fae28e1ae46c48e0a0.gif

On both the western and eastern limb two proms are shooting away, while the Moon passes along.

Still to come are the normal mode and the white-light recordings.

Nicolàs

 

Edited by inFINNity Deck
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Well... here is the white-light version:

Sun210610_white-light_animation.gif.6015a3518ccce52ad2820fb4467b64cb.gif

 

The Moon's limb clearly showing peaks and valleys.

Forgot to mention in the first post that the first image of both animations was taken around 08:30UTC, the second at around 09:00UTC, all following frames 5 minutes later.

Nicolàs

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The HA animation is amazing! The solar flares at 5 clock got my attention more than the eclipse. Fantastic work!

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Lovely time lapses. I know from experience that a lot of work and processing has gone into a huge amount of data so bravo!

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3 hours ago, Hughsie said:

Lovely time lapses. I know from experience that a lot of work and processing has gone into a huge amount of data so bravo!

Thanks Hughsie,

Indeed quite a bit of work has gone into processing, more than those three hours needed to collect the data. This weekend I will add another time-lapse with the normal H-alpha data (so not inverted), just for the fun of it and to see if that looks nicer.😉

Nicolàs

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Then here is the non-inverted animation from the Lunt images:

Sun210610_animation_normal.gif.4b1b2d00b701b28556c4fd01d773a996.gif

Two additional recordings were made around the time of first and second contact. From these the first contact was found to be at 09:18:11UTC (theoretically, according to Stellarium for our location, this would have been 09:17:55UTC) with an uncertainty due to undulation of 1 second. The second contact was found to be at around 11:31:45UTC (theoretically 11:31:26UTC) with an uncertainty of 3 seconds. So on average Stellarium calculated the contact 17.5 seconds too early. I should mention in this respect that the observatory computer is automatically time-synched every 256 seconds using an internet NIST-server and that I determined the position of the observatory with professional GPS-equipment with centimetre accuracy.

Nicolàs

 

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