Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Thursday, 10 July 2025

‹ 09.07.2025 2025 11.07.2025 ›

Photosphere sunspot drawing and RDS evaluation

10.07.2025 photosphere drawing

High-resolution scan (3231 px)

Time
07:10 UT
Observer
Süleyman FİŞEK
g
6
f
29
R
89
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · DAI – 13Group 1 · DAI – 13 Group 2 · AX_ – 1Group 2 · AX_ – 1 Group 3 · EKC – 8Group 3 · EKC – 8 Group 4 · AX_ – 1Group 4 · AX_ – 1 Group 5 · BXO – 3Group 5 · BXO – 3 Group 6 · CSO – 3Group 6 · CSO – 3
RDS data file (.gzd) 
[Gözlem]
Tarih=10.07.2025
Saat=07:10
Gözlemci=Süleyman FİŞEK
KontrolEden=Ergün EGE
Durumaçısı=1.61
Enlemaçısı=3.85
Boylamaçısı=84.87
Boylamfark=3
GKalite=3
GDurum=G.T
Kuzeyaçısı=-0.6
Sırano=20295
AyRasatNo=9
RasatÖnceki=09.07.2025
RasatSonraki=11.07.2025

[Leke Grupları]
Grupsayısı=6:3:3
LekeSayısı=29:22:7
RölatifSayı=89:52:37
01=DAI 13 +17.615 +22.978 107.848 +0.000 0000 0 +19.229 +26.460 +16.100 +19.911 +17.615 +25.846 +17.615 +20.111
02=AX_ 01 +10.393 -31.514 053.356 -1.000 0000 0 +10.393 -31.514 +10.393 -31.514
03=EKC 08 +19.366 -62.768 022.102 +0.000 0000 0 +21.168 -57.576 +17.564 -67.960 +19.366 -57.776 +19.366 -67.760
04=AX_ 01 -14.673 +59.655 144.525 -1.000 0000 0 -14.673 +59.655 -14.673 +59.655
05=BXO 03 -14.895 +43.790 127.949 +0.000 0000 0 -13.812 +45.350 -15.977 +40.807 -14.895 +45.150 -14.895 +41.700
06=CSO 03 -08.487 -40.366 044.504 +0.000 0000 0 -06.779 -36.987 -10.195 -43.745 -08.487 -37.187 -08.487 -43.545
20250710.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 →

2025/20250710_sf · SF · 6 frames · 128.6 MB · 07:19:27–07:22:27 UT

07:21:26 UT · 3 ms 07:19:27 UT · 6 ms 07:22:27 UT · 3 ms 07:20:26 UT · 3 ms 07:21:56 UT · 6 ms 07:20:56 UT · 6 ms

Coronado H-α animations from frame sequences

No Coronado observation for this day.