Images 20.04.2026 · Istanbul University Observatory Solar Observations

Solar Images Monday, 20 April 2026

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Photosphere sunspot drawing and RDS evaluation

High-resolution scan (3231 px)

Time: 09:40 UT
Observer: İrem ÖZDEMİR
g: 2
f: 16
R: 36
Seeing: 3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · EHI – 15

Group 2 · AR_ – 1

RDS data file (.gzd)

[Gözlem]
Tarih=20.04.2026
Saat=09:40
Gözlemci=İrem ÖZDEMİR
KontrolEden=Yağız ALTIKULAÇ
Durumaçısı=-25.58
Enlemaçısı=-5.19
Boylamaçısı=297.31
Boylamfark=1
GKalite=3
GDurum=
Kuzeyaçısı=-0.4
Sırano=20451
AyRasatNo=12
RasatÖnceki=18.04.2026
RasatSonraki=21.04.2026

[Leke Grupları]
Grupsayısı=2:1:1
LekeSayısı=16:15:1
RölatifSayı=36:25:11
01=EHI 15 +13.916 +14.662 311.972 +0.000 0000 0 +16.394 +21.640 +11.438 +08.259 +13.916 +20.864 +13.916 +08.459
02=AR_ 01 -19.160 +73.340 010.344 +0.000 0000 0 -18.288 +73.930 -19.745 +72.138 -19.160 +73.736 -19.160 +72.944

20260420.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.