Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Tuesday, 7 July 2026

‹ 06.07.2026 2026 08.07.2026 ›

Photosphere sunspot drawing and RDS evaluation

07.07.2026 photosphere drawing

High-resolution scan (3229 px)

Time
07:20 UT
Observer
Emre YILMAN
g
3
f
23
R
53
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · AX_ – 3Group 1 · AX_ – 3 Group 2 · BXI – 7Group 2 · BXI – 7 Group 3 · EKI – 13Group 3 · EKI – 13
RDS data file (.gzd) 
[Gözlem]
Tarih=7.07.2026
Saat=07:20
Gözlemci=Emre YILMAN
KontrolEden=Melike ERYILMAZ
Durumaçısı=0.15
Enlemaçısı=3.52
Boylamaçısı=346.94
Boylamfark=3
GKalite=3
GDurum=K.T
Kuzeyaçısı=-0.2
Sırano=20506
AyRasatNo=6
RasatÖnceki=06.07.2026
RasatSonraki=08.07.2026

[Leke Grupları]
Grupsayısı=3:1:2
LekeSayısı=23:3:20
RölatifSayı=53:13:40
01=AX_ 03 +13.811 -17.139 329.801 +0.000 0000 0 +14.418 -16.309 +13.204 -17.969 +13.811 -16.809 +13.811 -17.469
02=BXI 07 -11.410 +02.654 349.594 +0.000 0000 0 -08.436 -00.942 -13.647 +06.250 -11.410 +06.500 -11.410 -00.742
03=EKI 13 -07.797 -51.819 295.121 +0.000 0000 0 -04.803 -45.591 -10.790 -58.470 -07.797 -45.791 -07.797 -57.847
20260707.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 →

2026/20260707_ey · EY · 6 frames · 128.6 MB · 07:32:17–07:34:48 UT

07:34:48 UT · 30 ms 07:33:47 UT · 30 ms 07:32:47 UT · 30 ms 07:33:17 UT · 60 ms · over-exposed 07:32:17 UT · 60 ms · over-exposed 07:34:17 UT · 60 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.