Images 11.07.2025 · Istanbul University Observatory Solar Observations

Solar Images Friday, 11 July 2025

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Photosphere sunspot drawing and RDS evaluation

High-resolution scan (3229 px)

Time: 08:40 UT
Observer: Ergün EGE
g: 6
f: 28
R: 88
Seeing: 3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · CSI – 9

Group 2 · CSI – 8

Group 3 · AX_ – 1

Group 4 · DSI – 8

Group 5 · HS_ – 1

Group 6 · AX_ – 1

RDS data file (.gzd)

[Gözlem]
Tarih=11.07.2025
Saat=08:40
Gözlemci=Ergün EGE
KontrolEden=Ergün EGE
Durumaçısı=2.08
Enlemaçısı=3.96
Boylamaçısı=70.81
Boylamfark=2
GKalite=3
GDurum=G.T , K.T
Kuzeyaçısı=-0.5
Sırano=20296
AyRasatNo=10
RasatÖnceki=10.07.2025
RasatSonraki=12.07.2025

[Leke Grupları]
Grupsayısı=6:4:2
LekeSayısı=28:26:2
RölatifSayı=88:66:22
01=CSI 09 +17.908 +36.810 107.620 +0.000 0000 0 +19.480 +40.659 +16.335 +32.962 +17.908 +40.459 +17.908 +33.162
02=CSI 08 +27.648 +02.328 073.138 +0.000 0000 0 +28.764 +05.407 +26.531 -00.751 +27.648 +05.207 +27.648 -00.551
03=AX_ 01 +21.237 -32.356 038.454 +0.000 0000 0 +21.544 -32.126 +20.930 -32.585 +21.237 -32.626 +21.237 -32.850
04=DSI 08 +20.902 -47.903 022.907 +0.000 0000 0 +24.652 -42.913 +17.151 -52.892 +20.902 -43.113 +20.902 -52.692
05=HS_ 01 -07.979 -23.716 047.940 +0.000 0000 0 -07.850 -22.929 -08.873 -24.502 -07.979 -23.430 -07.979 -24.200
06=AX_ 01 -15.951 -78.366 352.444 +0.000 0000 0 -15.665 -76.746 -16.237 -79.986 -15.951 -77.246 -15.951 -79.486

20250711.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 →

2025/20250711 · · 10 frames · 214.3 MB · 08:41:02–09:02:47 UT

08:42:59 UT · 4 ms