Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Friday, 14 August 2026

‹ 13.08.2026 2026 15.08.2026 ›

Photosphere sunspot drawing and RDS evaluation

14.08.2026 photosphere drawing

High-resolution scan (3230 px)

Time
07:15 UT
Observer
Emre YILMAN
g
6
f
30
R
90
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · CSO – 4Group 1 · CSO – 4 Group 2 · BXO – 3Group 2 · BXO – 3 Group 3 · AX_ – 5Group 3 · AX_ – 5 Group 4 · DSI – 14Group 4 · DSI – 14 Group 5 · DSO – 2Group 5 · DSO – 2 Group 6 · CSO – 2Group 6 · CSO – 2
RDS data file (.gzd) 
[Gözlem]
Tarih=14.08.2026
Saat=07:15
Gözlemci=Emre YILMAN
KontrolEden=Burçin TANIK
Durumaçısı=15.72
Enlemaçısı=6.59
Boylamaçısı=204.32
Boylamfark=3
GKalite=3
GDurum=B.A
Kuzeyaçısı=-0.4
Sırano=20540
AyRasatNo=13
RasatÖnceki=13.08.2026
RasatSonraki=15.08.2026

[Leke Grupları]
Grupsayısı=6:5:1
LekeSayısı=30:28:2
RölatifSayı=90:78:12
01=CSO 04 +11.490 +63.604 267.924 +0.000 0000 0 +13.115 +66.401 +09.865 +60.807 +11.490 +66.201 +11.490 +61.700
02=BXO 03 +12.202 +18.859 223.179 +0.000 0000 0 +12.992 +21.195 +11.413 +16.523 +12.202 +20.695 +12.202 +17.230
03=AX_ 05 +10.965 +07.428 211.748 +0.000 0000 0 +11.686 +08.426 +10.245 +06.429 +10.965 +07.926 +10.965 +06.930
04=DSI 14 +04.462 -10.614 193.706 +0.000 0000 0 +06.364 -05.205 +02.560 -16.230 +04.462 -05.405 +04.462 -15.823
05=DSO 02 +07.251 -39.210 165.299 +0.000 0000 0 +08.706 -38.640 +05.797 -39.978 +07.337 -37.293 +07.337 -41.221
06=CSO 02 -15.865 +56.695 261.150 +0.000 0000 0 -14.871 +58.729 -16.858 +54.660 -15.865 +58.529 -15.865 +54.860
20260814.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 →

2026/20260814_ey · EY · 6 frames · 128.6 MB · 07:28:08–07:32:08 UT

07:30:08 UT · 30 ms 07:28:08 UT · 60 ms · over-exposed 07:31:08 UT · 60 ms · over-exposed 07:32:08 UT · 30 ms 07:29:38 UT · 60 ms 07:29:08 UT · 30 ms

Coronado H-α animations from frame sequences

No Coronado observation for this day.