Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Saturday, 20 June 2026

‹ 19.06.2026 2026 21.06.2026 ›

Photosphere sunspot drawing and RDS evaluation

20.06.2026 photosphere drawing

High-resolution scan (3229 px)

Time
08:40 UT
Observer
Ergün EGE
g
8
f
25
R
105
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · CSO – 2Group 1 · CSO – 2 Group 2 · AX_ – 1Group 2 · AX_ – 1 Group 3 · BXO – 7Group 3 · BXO – 7 Group 4 · AX_ – 1Group 4 · AX_ – 1 Group 5 · DSI – 5Group 5 · DSI – 5 Group 6 · AX_ – 1Group 6 · AX_ – 1 Group 7 · CAO – 4Group 7 · CAO – 4 Group 8 · CAO – 4Group 8 · CAO – 4
RDS data file (.gzd) 
[Gözlem]
Tarih=20.06.2026
Saat=08:40
Gözlemci=Ergün EGE
KontrolEden=Korhan YELKENCİ
Durumaçısı=-7.48
Enlemaçısı=1.62
Boylamaçısı=211.22
Boylamfark=2
GKalite=3
GDurum=K.T
Kuzeyaçısı=-0.2
Sırano=20491
AyRasatNo=15
RasatÖnceki=19.06.2026
RasatSonraki=21.06.2026

[Leke Grupları]
Grupsayısı=8:5:3
LekeSayısı=25:16:9
RölatifSayı=105:66:39
01=CSO 02 +07.262 +78.576 289.796 +0.000 0000 0 +09.400 +80.540 +05.520 +76.611 +07.262 +80.340 +07.262 +76.811
02=AX_ 01 +02.794 +37.901 249.121 +0.000 0000 0 +03.128 +38.376 +02.460 +37.426 +02.794 +37.876 +02.794 +37.926
03=BXO 07 +17.950 +06.377 217.597 +0.000 0000 0 +19.310 +08.625 +16.869 +04.129 +17.950 +08.425 +17.950 +04.329
04=AX_ 01 +16.699 -08.436 202.784 +0.000 0000 0 +17.174 -08.890 +16.224 -08.783 +16.699 -08.882 +16.699 -07.990
05=DSI 05 +06.879 -23.532 187.688 +0.000 0000 0 +08.151 -19.394 +05.608 -27.669 +06.879 -19.594 +06.879 -27.469
06=AX_ 01 -04.573 +12.880 224.100 +0.000 0000 0 -04.289 +13.258 -04.857 +12.502 -04.573 +12.758 -04.573 +13.200
07=CAO 04 -13.197 -62.926 148.294 +0.000 0000 0 -11.473 -61.308 -14.920 -64.543 -13.197 -61.508 -13.197 -64.343
08=CAO 04 -08.604 -77.814 133.406 +0.000 0000 0 -07.225 -72.860 -09.982 -82.768 -08.604 -73.600 -08.604 -82.568
20260620.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 →

2026/20260620 · · 6 frames · 128.6 MB · 08:42:27–08:51:44 UT

08:50:22 UT · 30 ms 08:42:27 UT · 30 ms 08:51:05 UT · 40 ms · over-exposed 08:46:15 UT · 50 ms · over-exposed 08:51:44 UT · 50 ms · over-exposed 08:43:52 UT · 40 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.