Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Saturday, 5 July 2025

‹ 04.07.2025 2025 06.07.2025 ›

Photosphere sunspot drawing and RDS evaluation

05.07.2025 photosphere drawing

High-resolution scan (3229 px)

Time
08:40 UT
Observer
Süleyman FİŞEK
g
5
f
24
R
74
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · HH_ – 1Group 1 · HH_ – 1 Group 2 · HS_ – 1Group 2 · HS_ – 1 Group 3 · DSC – 9Group 3 · DSC – 9 Group 4 · DSI – 8Group 4 · DSI – 8 Group 5 · CRI – 5Group 5 · CRI – 5
RDS data file (.gzd) 
[Gözlem]
Tarih=5.07.2025
Saat=08:40
Gözlemci=Süleyman FİŞEK
KontrolEden=Süleyman FİŞEK
Durumaçısı=-0.62
Enlemaçısı=3.34
Boylamaçısı=150.22
Boylamfark=2
GKalite=3
GDurum=G.T
Kuzeyaçısı=-0.6
Sırano=20291
AyRasatNo=5
RasatÖnceki=04.07.2025
RasatSonraki=06.07.2025

[Leke Grupları]
Grupsayısı=5:3:2
LekeSayısı=24:11:13
RölatifSayı=74:41:33
01=HH_ 01 +11.822 +69.286 219.506 +0.000 0000 0 +12.735 +70.572 +10.909 +68.100 +11.822 +70.220 +11.822 +68.550
02=HS_ 01 +21.667 +21.414 171.634 +0.000 0000 0 +22.552 +22.270 +20.782 +20.558 +21.667 +21.770 +21.667 +21.580
03=DSC 09 +02.999 +19.495 169.715 +0.000 0000 0 +04.760 +22.207 +01.922 +16.782 +02.999 +22.700 +02.999 +16.982
04=DSI 08 -18.433 +36.444 186.664 +0.000 0000 0 -16.919 +41.100 -19.946 +31.787 -18.433 +40.900 -18.433 +31.987
05=CRI 05 -09.770 -13.222 136.998 +0.000 0000 0 -06.687 -10.959 -11.468 -15.484 -09.770 -11.159 -09.770 -15.284
20250705.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 →

2025/20250705_sf · SF · 6 frames · 128.6 MB · 08:49:29–08:52:29 UT

08:50:29 UT · 3 ms 08:51:29 UT · 3 ms 08:52:29 UT · 3 ms 08:49:29 UT · 6 ms 08:51:59 UT · 6 ms 08:50:58 UT · 6 ms

Coronado H-α animations from frame sequences

No Coronado observation for this day.