#solareclipse

2025-06-18

"Today, the European Space Agency’s Proba-3 mission unveils its first images of the Sun’s outer atmosphere – the solar corona. The mission’s two satellites, able to fly as a single spacecraft thanks to a suite of onboard positioning technologies, have succeeded in creating their first ‘artificial total solar eclipse’ in orbit."

esa.int/Enabling_Support/Space

#ESA #Proba3 #Eclipses #SolarEclipse #Satellites

2025-06-17

Two European satellites mimic a total solar eclipse as scientists aim to study its corona.

The satellites have created the first artificial solar eclipse by flying in precise formation, providing hours of on-demand totality for scientists.

Dubbed Proba-3, the €181 million mission has generated 10 successful solar eclipses so far.

ESA released the eclipse pictures at the Paris Air Show on Monday.

mediafaro.org/article/20250616

#ESA #Space #Science #Sun #SolarEclipse #Proba3 #Coronagraph

Daniel Fischercosmos4u@scicomm.xyz
2025-06-16

The best artificial Total #SolarEclipse ever, delivered by ESA's #Proba3 spacecraft duo of which one carries the telescope while the other plays Moon - this allows imaging the solar #corona closer to the photosphere than any other coronagraph: esa.int/Enabling_Support/Space

A green image of the K corona, with the fine structure enhancedThe corona in polarized light
Daniel Fischercosmos4u@scicomm.xyz
2025-06-15

Coronal spectra of the 2024 Total #SolarEclipse with the ALIMAS and UV-PAMIS spectrographs flown on a WB-57 plane - as explained in agu.confex.com/agu/agu24/meeti with the plane in question in svs.gsfc.nasa.gov/14562/ - shown by Adalbert Ding at the SEC. 18/n

ALIMAS spectrumUV-PAMIS spectrum
Daniel Fischercosmos4u@scicomm.xyz
2025-06-15

The perils of observing a Total #SolarEclipse from the stratosphere: how the Romanian 2012 flight over Australia - astrofoto.ro/wp/?p=880 - had ended; the tree had to be cut in the end ... for AUD 200. No plans to repeat that effort. 17/n

The balloon in the tree
Daniel Fischercosmos4u@scicomm.xyz
2025-06-15

More slides about the 2028 Total #SolarEclipse from Terry Cuttle at the SEC - and about coming attractions down under. Relevant websites: eclipse.asa.astronomy.org.au/ and eclipse.aaq.org.au/ 16/n

Scences in the NW sectorViews in the red centerMore Aussie eclipsesLots of crossings
Daniel Fischercosmos4u@scicomm.xyz
2025-06-15

No more Spain for the next Total #SolarEclipse in 2028: SEC slides by Terry Cuttle and Jay Anderson about the Australian track and weather stats. 15/n

Da MapDa weatherWeather plotThe real thing
Daniel Fischercosmos4u@scicomm.xyz
2025-06-15

Next Total #SolarEclipse - 2027 in Spain again and a lot of North Africa: some aspects highlighted by Jay Anderson at the SEC in Belgium. 14/n

Western part of the trackEastern part of the trackThe real thingDanger of dust
Daniel Fischercosmos4u@scicomm.xyz
2025-06-15

O.k. four more slides by Eduard Masana at the Leuven SEC about the 2026 Total #SolarEclipse in Spain, namely what the Comisión Nacional del Eclipse is preparing: see iaa.csic.es/page/comision-naci and eclipses.ign.es and eclipse-spain.es/index.php/en/ for relevant websites. And some Final Thoughts and Recommendations about the expected eclipse experience in Spain. 13/n

The eclipse commissionWhat it doesWhat it also doesFinals thoughts
Daniel Fischercosmos4u@scicomm.xyz
2025-06-15

And yet more Masana slides about the 2026 Total #SolarEclipse - which largely hits a sparsely populated region of Spain. Which has a lot to offer besides the eclipse, of course. Also a helpful matrix comparing the five zones of the eclipse in Spain. 12/n

Tourism areasPopulation densityOther attractions (in that remote part of Spain)The five eclipse areas of spain condensed into a matrix.
Daniel Fischercosmos4u@scicomm.xyz
2025-06-15

More Masana slides about the geography and road network of relevance for the 2026 Total #SolarEclipse - beware of shadows and traffic. 11/n

The shadow problemIn the heart of the zoneThe road networkMobility on E day
Daniel Fischercosmos4u@scicomm.xyz
2025-06-15

Tons of valuable information about the 2026 Total #SolarEclipse at the Belgian conference today, esp. about the preferred Spain: some slides by Jay Anderson - see eclipsophile.com/tse2026/ for his full analysis - and Eduard Masana. 10/n

Overview wx mapA closer looklocations comparedThe landscapes in the zone
Daniel Fischercosmos4u@scicomm.xyz
2025-06-14

O.k., more screencaps from Michael Zeiler's #SolarEclipse Conference talk: stills from animations of the umbra moving over Spain in 2026 and 2027, setting the stage for tomorrow when most of the sessions will deal with future eclipses and planning. This summer a new website, EclipseAtlas.com (not up yet) will collect all old and new eclipse maps material. 9/n

2026 screenshot2027 animation screenshot
Daniel Fischercosmos4u@scicomm.xyz
2025-06-14

Yay, the German math and astronomy wizard Erhard Weigel - see bonnstern.wordpress.com/2022/0 for other achievements - is credited with the first-ever published #SolarEclipse map by Michael Zeiler during the final SEC talk, and it's already a pretty modern and clever one! 8/n - more tomorrow.

e The Dawn of Eclipse Mapping y. 3 @”"} % Erhard Weigel - Jena, Germany in 1654 ) fi e [ Cumsis TR MAGYA'D = AUGUSTI, 1550 ELUNAVISIDILIS. |\ ‘ 7 . = *,y = ¥y B | Fira—vare \Wh !~<&$‘? t?\if'“\ AN {n.m.mm i P Wy eSO 13 /ifi”wé\f SR ¢ RUDOLPHING.  EIREIEE R ¢ BN . o RO T R ) TYCHONE . B "o\ L i ISR R R (o) :fif'f“.& G G\ i.’j""‘v;\” : T f “"N‘( ;,.3». R ‘:'I" 2 “\"‘\:" £ ¥ / ! 1 1 il B ‘A‘\’\\ %%‘g%\‘“ £ eph | B, Orthographic projection A X :L‘X\/ T L e ISR E SR S B Early thematic map s Earliest spatio-temporal map?
Daniel Fischercosmos4u@scicomm.xyz
2025-06-14

What a valid lab test report for #SolarEclipse glasses looks like - from an SEC talk by Richard Fienberg who also co-authored a scientific paper on this topic in 2021: iopscience.iop.org/article/10. 7/n

Facsimile of part of official report
Daniel Fischercosmos4u@scicomm.xyz
2025-06-14

Hey, Jörg Schoppmeyer opened his talk at the #SolarEclipse Conference in Leuven on imaging annular eclipses without filters with one of my Australian pictures from 1999 (upper right): see geocities.restorativland.org/C for how they originated. Schoppmeyer's video youtube.com/watch?v=lbtQrHdl5O of the 2023 ASE actually found scientific use: iota-es.de/JOA/JOA2024_2.pdf#p (once again confirming the larger solar diameter scicomm.xyz/@cosmos4u/11468133 had determined by an entirely different technique). 6/n

Opening slide - with meeeeee
Daniel Fischercosmos4u@scicomm.xyz
2025-06-14

Four teaser slides from the amazing talk by Nicolas Lefaudeux at the #SolarEclipse conference about his vast - professional - experience in imaging and image processing applied to the solar corona: see hdr-astrophotography.com/solar for his results in high resolution (and hopefully the highly instructive talk will become available as well eventually). 5/n

Summary of important points for High Resolution imaging i \ / XL TE R L '}; / s / *  Always use lowest ISO ARV SRV L o L * Define bracketing to balance the time spend on the 6uter,k;orona\¢xfiosure? Vs m}rfiber of frames R R b VR /4 VT N\ RAE R RN '1‘”; S s Choice of camera: \ AU XA \*\ NI G e SRR DR CITE TR ‘\\g‘sfiig\fi\“ “’-“'“%X.\{f;’i ‘”‘w o ,}Z///f)'f i // SRR R R redpgi\afll_k tlme“\\\c% »‘)A' a‘.";:,f} ,f (i //;”/f’, ) i - Professional grade, “sports”_}&rxké\ Tl s ;;,-3‘»-,'!5\-!,\:‘ A {»’ g ‘/3; e ) R ‘-‘” gra S W A SRR AR SN O NN S Z Choice ofteles\que:‘ 5 R \‘%\:(?)&«?" S NG 7 / T '{r\’,@' ‘4 y 7 I AR R AT L T A R g Fccallength:700-i\gg@fifi ;u/mgl\‘jlx'\»j\h-‘f e LI e, ';’,,1 ‘5,*,*%?; /// Z * Usingalarge diBTfiEté\“ AT N PN RV %fi%g\?}) Calibration: “\ji:jlw‘s \ .'%’7% 7 ¢ DR TN R T 'qh\{@f es (especially flat) G . LT Y N i - N\ CRNUEET IR expgsl?' es ImHDR combinations s DRV weig}}f T ?:fs;’ 5Different TSE, different gear, different SNR: TSE 2024 Telescope 190mm diameter, Maksutov Newton, custom corrector Camera Nikon Z8, 46Mpix, 20 fps, 64 ISO Eclipse duration 2425 N 4 y Frames acquired 88 bracketed sequences (9frames, 1.3eV) = 792 frames S \ | % VA Total exposure 1455 G U ey A Conditions fair seeing, thin cirrus during half of eclipse | ~ s sy L e g Photons collected SN .; b\ g ’ The solar me\gosphere‘ 7 RN £ e i/ The mesophere is a very thin layer of the sun atmosphef‘e,*lo:'@‘ted jug\t ab‘ov%:hq photosphere and at the/Botton) of the chromosphere. Usually captured through flash spectrum as many blue en\is&ofil_(neifl;{\f A\ 7 I P /4 / Capturing the mesosphere requires both excellent resolution, and ultrashort exposure., / v A, RN O 4 Z

Almost saturated at 1/32000s, 64 SO, /5 ! N Arcsinh stretch (keeps the original RGB ratios)

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S 28 e .. s o N | i 3 R e — s oK o ey S A 11GB values on white balanced, linear “raw” 2 L7 ekt AN //// - ~10x brighter than chromosphere (even more if better resolution ?) Mesosphere R 180, G 220, B 245 Chromosphere / 1 Mesosphere R 120,G 160, B 200 S AR § TA AL X NP \ Conclusion .| 7 [ == Capturing the solar corona presents a significant chall‘en‘ge dg¢‘tq it\s\ext[eme gynamlc { ) - range and low. contrast. Achieving a very high signa|¥tt:\-poisg ratio (VRN ess‘ential'to/ V. — = reveal its intricate structure and fine details. \5)\ Y v /4 . = \ Nt u‘%fi A Vi 7 i N The main factors impacting SNR during:acquisition; ¢ “(Btiqfl‘ figoéfi?xefihg-fia [ AP " N\ A S 'i‘vi, MU W g (TN B R ‘@h"\\d&;x; Wil ,;y/;?q With high SNR data, unexpectedfeatureé?\i@fiffh EeIEIee Kv*"m%\\ '5"‘“ {1t «»/;ytl dark | blobs, coronal waves and possibly even .:g@iyfi!;fl; = ‘) ! W R \\\\ls T i N N e K 3 These principles should be n‘mz\;;h)’?fi%m’ Lol "\; (ol G LTS managing I-AF}NT}L“‘W"*‘ QUL it ) individuals) and flmwf‘ o &y _;'i?."_/;:_:j;;.m;;;; % ] I hope this information will help youmake the most of the precious seconds of totalityl )/ | Ny A Acknowlcdamf: ,‘?" ikon France for lending great camera — bodies and I/gn es-and making these images possible. L ; S, 3 S o) = (SRR T 5K, wamenn o e e N

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