Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Saturday, 10 October 2026

‹ 09.10.2026 2026 11.10.2026 ›

Photosphere sunspot drawing and RDS evaluation

10.10.2026 photosphere drawing

High-resolution scan (3231 px)

Time
08:00 UT
Observer
Süleyman FİŞEK
g
6
f
30
R
90
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · BXI – 5Group 1 · BXI – 5 Group 2 · CKI – 16Group 2 · CKI – 16 Group 3 · BXO – 4Group 3 · BXO – 4 Group 4 · AX_ – 1Group 4 · AX_ – 1 Group 5 · HS_ – 1Group 5 · HS_ – 1 Group 6 · EKC – 3Group 6 · EKC – 3
RDS data file (.gzd) 
[Gözlem]
Tarih=10.10.2026
Saat=08:00
Gözlemci=Süleyman FİŞEK
KontrolEden=Korhan YELKENCİ
Durumaçısı=26.25
Enlemaçısı=6.22
Boylamaçısı=171.24
Boylamfark=2
GKalite=3
GDurum=K.T
Kuzeyaçısı=-0.7
Sırano=20587
AyRasatNo=10
RasatÖnceki=09.10.2026
RasatSonraki=11.10.2026

[Leke Grupları]
Grupsayısı=6:3:3
LekeSayısı=30:25:5
RölatifSayı=90:55:35
01=BXI 05 +17.362 +50.796 222.360 +0.000 0000 0 +17.924 +53.810 +16.800 +47.781 +17.362 +53.311 +17.362 +48.282
02=CKI 16 +09.777 +44.978 216.218 +0.000 0000 0 +11.648 +50.321 +07.905 +39.635 +09.777 +50.121 +09.777 +39.835
03=BXO 04 +22.932 +24.600 195.246 +0.000 0000 0 +23.612 +25.891 +22.251 +22.122 +22.932 +25.985 +22.932 +23.215
04=AX_ 01 -00.188 +44.510 215.291 +0.000 0000 0 +00.450 +44.496 -00.422 +43.607 -00.188 +44.454 -00.188 +44.565
05=HS_ 01 -12.441 +17.162 188.402 +0.000 0000 0 -11.673 +17.847 -13.208 +16.476 -12.441 +17.347 -12.441 +16.977
06=EKC 03 -15.402 -68.383 102.857 +0.000 0000 0 -12.368 -61.803 -18.435 -74.963 -15.402 -62.300 -15.402 -74.763
20261010.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 →

2026/20261010_sf · SF · 6 frames · 128.6 MB · 08:32:47–08:35:17 UT

08:35:17 UT · 30 ms 08:34:17 UT · 30 ms 08:33:17 UT · 30 ms 08:32:47 UT · 60 ms · over-exposed 08:34:47 UT · 60 ms · over-exposed 08:33:47 UT · 60 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.