Images 09.05.2025 · Istanbul University Observatory Solar Observations

Solar Images Friday, 9 May 2025

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Photosphere sunspot drawing and RDS evaluation

High-resolution scan (3234 px)

Time: 08:00 UT
Observer: Ergün EGE
g: 4
f: 19
R: 59
Seeing: 3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · DKI – 9

Group 2 · CSI – 7

Group 3 · CSO – 2

Group 4 · HS_ – 1

RDS data file (.gzd)

[Gözlem]
Tarih=9.05.2025
Saat=08:00
Gözlemci=Ergün EGE
KontrolEden=Ergün EGE
Durumaçısı=-22.35
Enlemaçısı=-3.3
Boylamaçısı=184.86
Boylamfark=2
GKalite=3
GDurum=G.T
Kuzeyaçısı=-0.8
Sırano=20240
AyRasatNo=6
RasatÖnceki=07.05.2025
RasatSonraki=11.05.2025

[Leke Grupları]
Grupsayısı=4:2:2
LekeSayısı=19:16:3
RölatifSayı=59:36:23
01=DKI 09 +06.677 +56.292 241.152 +0.000 0000 0 +10.746 +61.610 +02.608 +51.524 +06.677 +60.861 +06.677 +51.724
02=CSI 07 +06.388 +25.801 210.661 +0.000 0000 0 +07.736 +29.444 +05.410 +22.158 +06.388 +29.244 +06.388 +22.358
03=CSO 02 -10.486 -03.453 181.407 +0.000 0000 0 -08.898 +00.504 -12.730 -07.410 -10.486 +00.304 -10.486 -07.210
04=HS_ 01 -20.778 -55.104 129.756 +0.000 0000 0 -20.209 -53.854 -21.348 -56.355 -20.778 -54.354 -20.778 -55.854

20250509.gzd

Chromosphere (H-α) FITS frames

The images are made automatically with a fixed, gentle rule: uneven illumination and most of the limb darkening are removed, and the brightness is shown on a linear scale (no sharpening); prominences get their own scale outside the limb. Frames are ordered by sharpness (seeing); frames without the Sun (darks, bias) come last. Method →

2025/20250509_ee · EE · 9 frames · 192.8 MB · 07:55:21–08:06:50 UT

07:55:21 UT · 20 ms