Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Monday, 7 July 2025

‹ 06.07.2025 2025 09.07.2025 ›

Photosphere sunspot drawing and RDS evaluation

07.07.2025 photosphere drawing

High-resolution scan (3230 px)

Time
07:05 UT
Observer
Süleyman FİŞEK
g
9
f
32
R
122
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · HS_ – 2Group 1 · HS_ – 2 Group 2 · CSI – 4Group 2 · CSI – 4 Group 3 · AX_ – 2Group 3 · AX_ – 2 Group 4 · DSI – 7Group 4 · DSI – 7 Group 5 · AX_ – 2Group 5 · AX_ – 2 Group 6 · DSC – 6Group 6 · DSC – 6 Group 7 · AX_ – 7Group 7 · AX_ – 7 Group 8 · AX_ – 1Group 8 · AX_ – 1 Group 9 · HH_ – 1Group 9 · HH_ – 1
RDS data file (.gzd) 
[Gözlem]
Tarih=7.07.2025
Saat=07:05
Gözlemci=Süleyman FİŞEK
KontrolEden=Burçin TANIK
Durumaçısı=0.25
Enlemaçısı=3.54
Boylamaçısı=124.62
Boylamfark=3
GKalite=3
GDurum=G.T
Kuzeyaçısı=-0.5
Sırano=20293
AyRasatNo=7
RasatÖnceki=06.07.2025
RasatSonraki=09.07.2025

[Leke Grupları]
Grupsayısı=9:3:6
LekeSayısı=32:8:24
RölatifSayı=122:38:84
01=HS_ 02 +22.189 +46.586 171.206 +0.000 0000 0 +22.965 +47.235 +21.413 +45.937 +22.189 +46.735 +22.189 +46.437
02=CSI 04 +03.364 +44.467 169.870 +0.000 0000 0 +04.151 +48.876 +02.576 +40.590 +03.364 +48.110 +03.364 +40.824
03=AX_ 02 +09.836 +06.870 130.707 +0.000 0000 0 +10.772 +06.697 +08.899 +05.477 +09.836 +06.980 +09.836 +06.760
04=DSI 07 -19.864 +62.531 187.151 +0.000 0000 0 -17.878 +57.488 -21.850 +67.574 -19.864 +67.374 -19.864 +57.688
05=AX_ 02 -04.377 +46.500 171.120 +0.000 0000 0 -03.759 +47.273 -04.996 +45.727 -04.377 +46.773 -04.377 +46.227
06=DSC 06 -22.490 +17.890 142.510 +0.000 0000 0 -19.898 +20.435 -24.200 +15.345 -22.490 +20.235 -22.490 +15.545
07=AX_ 07 -09.564 +12.382 137.200 +0.000 0000 0 -08.442 +13.633 -10.686 +11.131 +00.000 +00.000 +00.000 +00.000
08=AX_ 01 -16.214 +05.181 129.801 -1.000 0000 0 -16.214 +05.181 -16.214 +05.181
09=HH_ 01 -08.202 -77.752 046.868 +0.000 0000 0 -07.413 -76.412 -08.991 -79.920 -08.202 -76.498 -08.202 -79.600
20250707.gzd

Chromosphere (H-α) FITS frames

H-α

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 →

2025/20250707_sf · SF · 6 frames · 128.6 MB · 07:18:38–07:21:37 UT

07:19:38 UT · 3 ms 07:21:37 UT · 3 ms 07:20:37 UT · 3 ms 07:18:38 UT · 6 ms 07:20:08 UT · 6 ms 07:21:07 UT · 6 ms

Coronado H-α animations from frame sequences

No Coronado observation for this day.