Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Sunday, 6 September 2026

‹ 05.09.2026 2026 07.09.2026 ›

Photosphere sunspot drawing and RDS evaluation

06.09.2026 photosphere drawing

High-resolution scan (3230 px)

Time
07:36 UT
Observer
Süleyman FİŞEK
g
5
f
17
R
67
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · DAI – 8Group 1 · DAI – 8 Group 2 · HK_ – 4Group 2 · HK_ – 4 Group 3 · HK_ – 3Group 3 · HK_ – 3 Group 4 · HH_ – 1Group 4 · HH_ – 1 Group 5 · HH_ – 1Group 5 · HH_ – 1
RDS data file (.gzd) 
[Gözlem]
Tarih=6.09.2026
Saat=07:36
Gözlemci=Süleyman FİŞEK
KontrolEden=Süleyman FİŞEK
Durumaçısı=22.29
Enlemaçısı=7.24
Boylamaçısı=260.23
Boylamfark=2
GKalite=3
GDurum=K.T
Kuzeyaçısı=-0.1
Sırano=20561
AyRasatNo=6
RasatÖnceki=05.09.2026
RasatSonraki=07.09.2026

[Leke Grupları]
Grupsayısı=5:4:1
LekeSayısı=17:16:1
RölatifSayı=67:56:11
01=DAI 08 +09.334 -01.553 258.677 +0.000 0000 0 +10.588 +04.595 +08.800 -07.701 +09.334 +04.395 +09.334 -07.501
02=HK_ 04 +11.507 -37.302 222.928 +0.000 0000 0 +12.526 -35.472 +10.487 -39.132 +11.507 -35.972 +11.507 -38.632
03=HK_ 03 +01.583 -57.903 202.327 +0.000 0000 0 +03.204 -55.568 -00.390 -60.238 +01.583 -56.680 +01.583 -59.738
04=HH_ 01 +10.940 -74.818 185.412 +0.000 0000 0 +11.166 -72.882 +09.230 -76.753 +10.940 -73.382 +10.940 -76.254
05=HH_ 01 -12.473 -75.947 184.283 +0.000 0000 0 -11.253 -73.470 -13.694 -78.847 -12.473 -73.758 -12.473 -78.135
20260906.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 →

2026/20260906_sf · SF · 6 frames · 128.6 MB · 07:47:21–07:50:22 UT

07:49:21 UT · 30 ms 07:48:21 UT · 30 ms 07:50:22 UT · 30 ms 07:47:21 UT · 60 ms · over-exposed 07:49:52 UT · 60 ms · over-exposed 07:48:51 UT · 60 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.