Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Wednesday, 8 July 2026

‹ 07.07.2026 2026 10.07.2026 ›

Photosphere sunspot drawing and RDS evaluation

08.07.2026 photosphere drawing

High-resolution scan (3230 px)

Time
08:05 UT
Observer
S.FİŞEK+M.E.
g
5
f
33
R
83
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · AX_ – 1Group 1 · AX_ – 1 Group 2 · AX_ – 1Group 2 · AX_ – 1 Group 3 · AX_ – 1Group 3 · AX_ – 1 Group 4 · CRI – 15Group 4 · CRI – 15 Group 5 · EHI – 15Group 5 · EHI – 15
RDS data file (.gzd) 
[Gözlem]
Tarih=8.07.2026
Saat=08:05
Gözlemci=S.FİŞEK+M.E.
KontrolEden=Korhan YELKENCİ
Durumaçısı=0.61
Enlemaçısı=3.62
Boylamaçısı=333.29
Boylamfark=2
GKalite=3
GDurum=K.T
Kuzeyaçısı=-0.7
Sırano=20507
AyRasatNo=7
RasatÖnceki=07.07.2026
RasatSonraki=10.07.2026

[Leke Grupları]
Grupsayısı=5:2:3
LekeSayısı=33:2:31
RölatifSayı=83:22:61
01=AX_ 01 +14.958 -02.967 330.323 -1.000 0000 0 +14.958 -02.967 +14.958 -02.967
02=AX_ 01 +09.708 -32.499 300.791 -1.000 0000 0 +09.708 -32.499 +09.708 -32.499
03=AX_ 01 -16.105 +49.421 022.711 -1.000 0000 0 -16.105 +49.421 -16.105 +49.421
04=CRI 15 -09.405 +17.697 350.987 +0.000 0000 0 -07.460 +20.849 -11.764 +14.544 -09.405 +20.649 -09.405 +14.744
05=EHI 15 -06.613 -36.210 297.800 09.617 0000 0 -04.650 -29.997 -09.161 -42.424 -06.724 -31.713 -07.944 -38.936
20260708.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 →

2026/20260708_sf · SF · 6 frames · 128.6 MB · 08:13:43–08:16:14 UT

08:15:14 UT · 30 ms 08:16:14 UT · 30 ms 08:14:13 UT · 30 ms 08:13:43 UT · 60 ms · over-exposed 08:15:44 UT · 60 ms · over-exposed 08:14:43 UT · 60 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.