Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Thursday, 23 July 2026

‹ 22.07.2026 2026 24.07.2026 ›

Photosphere sunspot drawing and RDS evaluation

23.07.2026 photosphere drawing

High-resolution scan (3231 px)

Time
08:45 UT
Observer
Melike ERYILMAZ
g
4
f
22
R
62
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · EKC – 10Group 1 · EKC – 10 Group 2 · HK_ – 8Group 2 · HK_ – 8 Group 3 · HS_ – 2Group 3 · HS_ – 2 Group 4 · HS_ – 2Group 4 · HS_ – 2
RDS data file (.gzd) 
[Gözlem]
Tarih=23.07.2026
Saat=08:45
Gözlemci=Melike ERYILMAZ
KontrolEden=Melike ERYILMAZ
Durumaçısı=7.23
Enlemaçısı=5.07
Boylamaçısı=134.44
Boylamfark=2
GKalite=3
GDurum=G.T , H.S , K.T
Kuzeyaçısı=-1.5
Sırano=20520
AyRasatNo=20
RasatÖnceki=22.07.2026
RasatSonraki=24.07.2026

[Leke Grupları]
Grupsayısı=4:2:2
LekeSayısı=22:18:4
RölatifSayı=62:38:24
01=EKC 10 +05.165 +23.140 157.454 +0.000 0000 0 +06.977 +29.840 +03.353 +16.944 +05.165 +28.884 +05.165 +17.144
02=HK_ 08 +16.131 -28.138 106.302 +0.000 0000 0 +17.868 -25.527 +14.394 -30.750 +16.131 -26.270 +16.131 -30.250
03=HS_ 02 -07.466 +56.962 191.402 +0.000 0000 0 -06.360 +58.194 -08.897 +55.730 -07.466 +57.694 -07.466 +56.230
04=HS_ 02 -02.259 -47.439 087.100 +0.000 0000 0 -01.407 -45.995 -03.110 -48.884 -02.259 -46.494 -02.259 -48.383
20260723.gzd

Chromosphere (H-α) FITS frames

No chromosphere observation for this day.

Coronado H-α animations from frame sequences

No Coronado observation for this day.