Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Monday, 9 November 2026

‹ 07.11.2026 2026 10.11.2026 ›

Photosphere sunspot drawing and RDS evaluation

09.11.2026 photosphere drawing

High-resolution scan (3235 px)

Time
07:10 UT
Observer
Betül CİVELEKLER
g
4
f
21
R
61
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · HA_ – 1Group 1 · HA_ – 1 Group 2 · ?__ – 2Group 2 · ?__ – 2 Group 3 · CHI – 15Group 3 · CHI – 15 Group 4 · BXO – 3Group 4 · BXO – 3
RDS data file (.gzd) 
[Gözlem]
Tarih=9.11.2026
Saat=07:10
Gözlemci=Betül CİVELEKLER
KontrolEden=
Durumaçısı=22.84
Enlemaçısı=3.53
Boylamaçısı=136.05
Boylamfark=3
GKalite=3
GDurum=G.T , K.T
Kuzeyaçısı=-0.9
Sırano=20602
AyRasatNo=5
RasatÖnceki=07.11.2026
RasatSonraki=

[Leke Grupları]
Grupsayısı=4:2:2
LekeSayısı=21:3:18
RölatifSayı=61:23:38
01=HA_ 01 +12.985 +47.746 183.796 +0.000 0000 0 +13.530 +48.711 +12.439 +46.781 +12.985 +48.211 +12.985 +47.281
02=?__ 02 +11.749 -81.110 055.390 +0.000 0000 0 +12.534 -77.258 +10.963 -84.764 +11.749 -77.857 +11.749 -84.363
03=CHI 15 -06.554 +09.427 145.477 +0.000 0000 0 -04.837 +14.263 -08.270 +04.590 -06.554 +14.630 -06.554 +04.790
04=BXO 03 -08.118 -09.694 126.356 +0.000 0000 0 -07.693 -07.947 -08.544 -11.441 -08.118 -08.447 -08.118 -10.941
20261109.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 →

2026/20261109_bci · BCI · 1 frames · 21.4 MB · 08:22:52 UT

08:22:52 UT · 20 ms

Chromosphere (SER video) · 07:21:33–07:25:48 UT

Sharpest frame
Light curve (flare indicator) Light curve

Top: the brightest disk points (quiet Sun = 1); a sudden rise may be a flare. Bottom: bright and dark (sunspot) area as a percentage of the disk.

Frames
1,000 (used 22)
Exposure
3.16 ms
Gain
112 (23%)
Camera
QHY5III174M
Raw data
52.8 MB · SER
Folder
2026/Sun/091126/2026-11-09-0723_6-U-L-Sun.ser

Chromosphere (SER video) · 08:04:48–08:05:14 UT

Sharpest frame
Light curve (flare indicator) Light curve

Top: the brightest disk points (quiet Sun = 1); a sudden rise may be a flare. Bottom: bright and dark (sunspot) area as a percentage of the disk.

Frames
100 (used 100)
Exposure
3.15 ms
Gain
112 (23%)
Camera
QHY5III174M
Raw data
230.4 MB · SER
Folder
2026/Sun/091126/2026-11-09-0805_0-U-L-Sun.ser

Coronado H-α animations from frame sequences

The animations are stabilised (the disk stays in place). The brightness scale is chosen once for the whole film from the sharpest frames, so a real flare shows up as a brightening. Method →

Coronado H-α · 08:12:10–08:31:18 UT · observing session

Sharpest frame
Light curve (flare indicator) Light curve

Top: the brightest disk points (quiet Sun = 1); a sudden rise may be a flare. Bottom: bright and dark (sunspot) area as a percentage of the disk.

This film is made of 10 short captures: the sharper half of each capture was stacked into one frame, each film frame is about one minute. 5/10 captures were used (the others were cloudy or the Sun was outside the field).

Frames
915 (used 201)
Exposure
10.00 ms
Gain
10
Camera
QHY5III174M
Raw data
1.44 GB · FITS · 10 captures
Folder
2026-11-09/Sun/oturum_08_12_11Z