Newest observations
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Jämsä, Starlink -satelliitteja
I
21.3.2023 at 03.19 -
Kajaani, Starlink -satelliitteja
I
21.3.2023 at 03.19 -
Kuhmo, Niemiskylä, Active aurora band
III
21.3.2023 at 01.45 -
Kurikka, Jurva, Quiet aurora arc
II
21.3.2023 at 01.45 -
Jyväskylä, A fireball at night, brighter than the venus
III
20.3.2023 at 22.15 -
Muhos, A fireball at night, as bright as a crescent moon
III
20.3.2023 at 22.10 -
Kokkola, Satellite
IV
20.3.2023 at 21.54 -
Lempäälä, Sääksjärvi, Landscape image of a planet
I
19.3.2023 at 20.03 -
Kokkola, Kälviä, One halo form
I
19.3.2023 at 17.15 -
Rovaniemi, One halo form
I
19.3.2023 at 16.00 -
Kemijärvi, Several halo forms
II
19.3.2023 at 15.30 -
Kittilä, Several halo forms
II
19.3.2023 at 14.35
Contact information
Visibility I / V
Jorma Ryske, Etelä-Suomen kosmol. seura
The JWST James Webb Space Telescope is currently stationary at the L2 point, aligning its mirrors, and its apparent motion relative to the stars is distinguished in this animation exposed for 30x90s = 45 minutes. The apparent motion of the JWST with respect to the stars is mainly due to the annual orbit of the Earth (= observer) L2 point in its orbit around the sun, the daily rotation of the Earth (= observer) and the motion of the JWST around the L2 point.
The brightness measured from the JWST image is mag 15.86. It is clearly, up to 1.5 magnitude brighter than the January observations.
The animation also shows the motion of two dim asteroids in the lower right quarter of the image. The upper and slightly brighter of these is the asteroid (50872) 2000 GT10, with a brightness mag of 18.49 measured from its image. The lower is (20883) Gervais, measured brightness mag 19.07.
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Yllättävän kirkas.
Olenkohan joskus kysynyt että millä ohjelmalla teet animaatiot - no kysyn nyt ?
PixInsightissa on Blink-toiminto, jolla animaatiot saa vaivattomasti tehtyä. Se tekee animaation vaikka suoraan raaka-fitseistä mutta kalibroiduista kuvista tulee tietysti vähän paremmat. Blink hoitaa myös automaattisen histogrammimuunnoksen ja sitten lopuksi blinkin käyttämä moduli ffmpeg.exe tekee renderöinnin gif:fiksi.
JWST liikkuu tähtien suhteen kiertäessään Aurinkoa. Noin asteen vuorokaudessa.