Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Thursday, 2 July 2026

‹ 01.07.2026 2026 03.07.2026 ›

Photosphere sunspot drawing and RDS evaluation

02.07.2026 photosphere drawing

High-resolution scan (3230 px)

Time
08:35 UT
Observer
Emre YILMAN
g
3
f
76
R
106
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · FKI – 28Group 1 · FKI – 28 Group 2 · EKI – 16Group 2 · EKI – 16 Group 3 · FKC – 32Group 3 · FKC – 32
RDS data file (.gzd) 
[Gözlem]
Tarih=2.07.2026
Saat=08:35
Gözlemci=Emre YILMAN
KontrolEden=Emre YILMAN
Durumaçısı=-2.09
Enlemaçısı=2.99
Boylamaçısı=52.15
Boylamfark=2
GKalite=3
GDurum=G.T
Kuzeyaçısı=-0.4
Sırano=20502
AyRasatNo=2
RasatÖnceki=01.07.2026
RasatSonraki=03.07.2026

[Leke Grupları]
Grupsayısı=3:1:2
LekeSayısı=76:28:48
RölatifSayı=106:38:68
01=FKI 28 +16.326 +41.661 093.811 +0.000 0000 0 +19.886 +49.830 +12.767 +34.238 +16.326 +49.257 +16.326 +34.650
02=EKI 16 -15.674 +45.464 097.614 +0.000 0000 0 -12.633 +51.831 -18.715 +39.970 -15.674 +51.194 -15.674 +39.734
03=FKC 32 -04.670 +22.494 074.644 +0.000 0000 0 -00.219 +31.799 -09.122 +13.190 -04.670 +31.598 -04.670 +13.389
20260702.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 →

2026/20260702_EY · EY · 6 frames · 128.6 MB · 08:48:31–08:51:01 UT

08:51:01 UT · 30 ms 08:50:01 UT · 30 ms 08:49:01 UT · 30 ms 08:50:31 UT · 60 ms · over-exposed 08:48:31 UT · 60 ms · over-exposed 08:49:31 UT · 60 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.