Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Wednesday, 3 June 2026

‹ 02.06.2026 2026 04.06.2026 ›

Photosphere sunspot drawing and RDS evaluation

03.06.2026 photosphere drawing

High-resolution scan (3230 px)

Time
08:20 UT
Observer
Süleyman FİŞEK
g
9
f
58
R
148
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · DHC – 23Group 1 · DHC – 23 Group 2 · AX_ – 1Group 2 · AX_ – 1 Group 3 · DSC – 7Group 3 · DSC – 7 Group 4 · BXO – 5Group 4 · BXO – 5 Group 5 · CHO – 3Group 5 · CHO – 3 Group 6 · DSO – 2Group 6 · DSO – 2 Group 7 · BXI – 4Group 7 · BXI – 4 Group 8 · DSC – 11Group 8 · DSC – 11 Group 9 · CAO – 2Group 9 · CAO – 2
RDS data file (.gzd) 
[Gözlem]
Tarih=3.06.2026
Saat=08:20
Gözlemci=Süleyman FİŞEK
KontrolEden=Emre YILMAN
Durumaçısı=-14.55
Enlemaçısı=-0.42
Boylamaçısı=76.41
Boylamfark=2
GKalite=3
GDurum=G.T
Kuzeyaçısı=-0.7
Sırano=20479
AyRasatNo=3
RasatÖnceki=02.06.2026
RasatSonraki=05.06.2026

[Leke Grupları]
Grupsayısı=9:4:5
LekeSayısı=58:36:22
RölatifSayı=148:76:72
01=DHC 23 +14.200 +09.686 086.960 +0.000 0000 0 +17.500 +13.920 +10.503 +05.452 +14.200 +13.720 +14.200 +05.652
02=AX_ 01 +15.322 -32.657 043.753 -1.000 0000 0 +15.322 -32.657 +15.322 -32.657
03=DSC 07 +13.764 -44.336 032.740 +0.000 0000 0 +15.393 -40.252 +12.135 -48.420 +13.764 -40.452 +13.764 -48.220
04=BXO 05 +16.836 -69.390 007.200 +0.000 0000 0 +18.815 -66.195 +14.858 -72.585 +16.836 -66.395 +16.836 -72.385
05=CHO 03 -13.524 +63.239 139.649 +0.000 0000 0 -11.595 +65.958 -15.452 +60.519 -13.524 +65.758 -13.524 +60.719
06=DSO 02 -21.573 +62.940 138.504 +0.000 0000 0 -20.832 +58.774 -22.314 +65.415 -21.573 +65.760 -21.573 +60.119
07=BXI 04 -07.765 +44.643 121.530 +0.000 0000 0 -06.769 +46.787 -08.762 +42.498 -07.765 +46.587 -07.765 +42.698
08=DSC 11 -04.351 -02.500 074.360 +0.000 0000 0 -02.439 +01.214 -06.263 -05.315 -04.351 +01.140 -04.351 -05.115
09=CAO 02 -20.163 -67.917 008.493 +0.000 0000 0 -19.488 -65.573 -20.838 -70.261 -20.163 -66.730 -20.163 -69.761
20260603.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 →

2026/20260603_sf · SF · 6 frames · 128.6 MB · 08:28:09–08:31:09 UT

08:29:08 UT · 30 ms 08:31:09 UT · 30 ms 08:30:09 UT · 30 ms 08:30:39 UT · 60 ms · over-exposed 08:29:38 UT · 60 ms · over-exposed 08:28:09 UT · 60 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.