Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Saturday, 5 September 2026

‹ 04.09.2026 2026 06.09.2026 ›

Photosphere sunspot drawing and RDS evaluation

05.09.2026 photosphere drawing

High-resolution scan (3230 px)

Time
07:45 UT
Observer
Süleyman FİŞEK
g
3
f
10
R
40
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · ESO – 4Group 1 · ESO – 4 Group 2 · CKO – 3Group 2 · CKO – 3 Group 3 · HH_ – 3Group 3 · HH_ – 3
RDS data file (.gzd) 
[Gözlem]
Tarih=5.09.2026
Saat=07:45
Gözlemci=Süleyman FİŞEK
KontrolEden=Süleyman FİŞEK
Durumaçısı=22.07
Enlemaçısı=7.24
Boylamaçısı=273.36
Boylamfark=2
GKalite=3
GDurum=K.T
Kuzeyaçısı=-0.5
Sırano=20560
AyRasatNo=5
RasatÖnceki=04.09.2026
RasatSonraki=06.09.2026

[Leke Grupları]
Grupsayısı=3:3:0
LekeSayısı=10:10:0
RölatifSayı=40:40:0
01=ESO 04 +09.281 -13.804 259.556 +0.000 0000 0 +10.454 -07.984 +08.107 -19.625 +09.281 -08.184 +09.281 -19.425
02=CKO 03 +11.283 -54.235 219.125 +0.000 0000 0 +12.687 -47.824 +09.879 -60.645 +11.283 -48.240 +11.283 -60.445
03=HH_ 03 +02.379 -70.980 203.262 +0.000 0000 0 +03.852 -67.217 +00.907 -72.980 +02.379 -68.599 +02.379 -73.362
20260905.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 →

2026/20260905_sf · SF · 6 frames · 128.6 MB · 07:54:12–07:57:14 UT

07:57:14 UT · 30 ms 07:55:12 UT · 30 ms 07:56:13 UT · 30 ms 07:55:43 UT · 60 ms · over-exposed 07:56:43 UT · 60 ms · over-exposed 07:54:12 UT · 60 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.