Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Tuesday, 14 July 2026

‹ 13.07.2026 2026 15.07.2026 ›

Photosphere sunspot drawing and RDS evaluation

14.07.2026 photosphere drawing

High-resolution scan (3214 px)

Time
10:00 UT
Observer
Olcay PLEVNE
g
2
f
4
R
24
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · HS_ – 2Group 1 · HS_ – 2 Group 2 · HS_ – 2Group 2 · HS_ – 2
RDS data file (.gzd) 
[Gözlem]
Tarih=14.07.2026
Saat=10:00
Gözlemci=Olcay PLEVNE
KontrolEden=Melike ERYILMAZ
Durumaçısı=3.34
Enlemaçısı=4.24
Boylamaçısı=252.83
Boylamfark=1
GKalite=3
GDurum=G.T
Kuzeyaçısı=0.0
Sırano=20512
AyRasatNo=12
RasatÖnceki=13.07.2026
RasatSonraki=15.07.2026

[Leke Grupları]
Grupsayısı=2:0:2
LekeSayısı=4:0:4
RölatifSayı=24:0:24
01=HS_ 02 -09.274 +46.951 299.781 +0.000 0000 0 -07.337 +49.742 -11.212 +44.160 -09.274 +49.242 -09.274 +44.660
02=HS_ 02 -06.560 -62.843 189.987 +0.000 0000 0 -05.940 -60.414 -08.270 -65.273 -06.560 -60.913 -06.560 -64.772
20260714.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 →

2026/20260714_op · OP · 4 frames · 85.7 MB · 10:09:42–10:16:03 UT

10:11:16 UT · 40 ms · over-exposed 10:09:42 UT · 40 ms · over-exposed 10:15:26 UT · 50 ms · over-exposed 10:16:03 UT · 50 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.