Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Wednesday, 2 September 2026

‹ 01.09.2026 2026 03.09.2026 ›

Photosphere sunspot drawing and RDS evaluation

02.09.2026 photosphere drawing

High-resolution scan (3230 px)

Time
08:30 UT
Observer
Melike ERYILMAZ
g
2
f
9
R
29
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · ESO – 3Group 1 · ESO – 3 Group 2 · BXI – 6Group 2 · BXI – 6
RDS data file (.gzd) 
[Gözlem]
Tarih=2.09.2026
Saat=08:30
Gözlemci=Melike ERYILMAZ
KontrolEden=Emre YILMAN
Durumaçısı=21.36
Enlemaçısı=7.21
Boylamaçısı=312.57
Boylamfark=2
GKalite=3
GDurum=K.T
Kuzeyaçısı=-1.0
Sırano=20557
AyRasatNo=2
RasatÖnceki=01.09.2026
RasatSonraki=03.09.2026

[Leke Grupları]
Grupsayısı=2:1:1
LekeSayısı=9:3:6
RölatifSayı=29:13:16
01=ESO 03 +09.939 -54.676 257.894 +0.000 0000 0 +11.341 -48.521 +08.537 -60.831 +09.939 -48.721 +09.939 -60.631
02=BXI 06 -10.756 +22.972 335.542 +0.000 0000 0 -09.599 +25.752 -11.913 +20.192 -10.756 +25.552 -10.756 +20.392
20260902.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 →

2026/20260902_me · ME · 6 frames · 128.6 MB · 08:45:06–08:48:05 UT

08:47:05 UT · 30 ms 08:46:05 UT · 30 ms 08:48:05 UT · 30 ms 08:45:06 UT · 60 ms · over-exposed 08:47:35 UT · 60 ms · over-exposed 08:46:35 UT · 60 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.