Images 19.02.2026 · Istanbul University Observatory Solar Observations

Solar Images Thursday, 19 February 2026

‹ 16.02.2026 2026 20.02.2026 ›

Photosphere sunspot drawing and RDS evaluation

High-resolution scan (3230 px)

Time: 08:50 UT
Observer: Ergün EGE
g: 3
f: 4
R: 34
Seeing: 3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · HS_ – 1

Group 2 · AX_ – 1

Group 3 · BXO – 2

RDS data file (.gzd)

[Gözlem]
Tarih=19.02.2026
Saat=08:50
Gözlemci=Ergün EGE
KontrolEden=Emre YILMAN
Durumaçısı=-18.78
Enlemaçısı=-6.99
Boylamaçısı=9.08
Boylamfark=2
GKalite=3
GDurum=
Kuzeyaçısı=-0.4
Sırano=20422
AyRasatNo=4
RasatÖnceki=16.02.2026
RasatSonraki=20.02.2026

[Leke Grupları]
Grupsayısı=3:3:0
LekeSayısı=4:4:0
RölatifSayı=34:34:0
01=HS_ 01 +09.211 +53.615 062.695 +0.000 0000 0 +10.784 +55.290 +07.637 +52.200 +09.211 +54.660 +09.211 +52.570
02=AX_ 01 +16.296 +24.490 033.129 +0.000 0000 0 +16.818 +24.425 +15.775 +23.674 +16.296 +24.365 +16.296 +24.615
03=BXO 02 +06.821 -05.964 003.116 +0.000 0000 0 +08.185 -04.250 +05.458 -07.902 +06.821 -04.225 +06.821 -07.702

20260219.gzd

Chromosphere (H-α) FITS frames

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 →

2026/20260219 · · 9 frames · 192.8 MB · 08:53:49–09:04:29 UT

09:01:47 UT · 20 ms