Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Thursday, 26 August 2021

‹ 25.08.2021 2021 27.08.2021 ›

Photosphere sunspot drawing and RDS evaluation

26.08.2021 photosphere drawing

High-resolution scan (3231 px)

Time
10:11 UT
Observer
Talar YONTAN
g
4
f
31
R
71
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · CSI – 7Group 1 · CSI – 7 Group 2 · AX_ – 2Group 2 · AX_ – 2 Group 3 · DSI – 21Group 3 · DSI – 21 Group 4 · AX_ – 1Group 4 · AX_ – 1
RDS data file (.gzd) 
[Gözlem]
Tarih=26.08.2021
Saat=10:11
Gözlemci=Talar YONTAN
KontrolEden=Başar COŞKUNOĞLU
Durumaçısı=19.59
Enlemaçısı=7.07
Boylamaçısı=25.09
Boylamfark=1
GKalite=3
GDurum=G.T , K.T
Kuzeyaçısı=0.0
Sırano=19258
AyRasatNo=26
RasatÖnceki=25.08.2021
RasatSonraki=27.08.2021

[Leke Grupları]
Grupsayısı=4:2:2
LekeSayısı=31:9:22
RölatifSayı=71:29:42
01=CSI 07 +18.376 -16.613 008.477 06.256 0000 0 +19.315 -14.914 +17.436 -18.311 +18.647 -15.636 +18.376 -18.111
02=AX_ 02 +15.468 -62.959 322.131 +0.000 0000 0 +15.899 -62.213 +15.360 -63.705 +15.468 -62.713 +15.468 -63.205
03=DSI 21 -27.860 -24.318 000.772 23.176 0000 0 -24.938 -19.851 -30.783 -28.785 -26.289 -21.428 -29.410 -27.875
04=AX_ 01 -16.849 -56.197 328.893 -1.000 0000 0 -16.849 -56.197 -16.849 -56.197
20210826.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 →

2021/20210826_ty · TY · 8 frames · 171.4 MB · 10:27:10–10:41:55 UT

10:29:51 UT · 30 ms 10:37:05 UT · 30 ms 10:27:10 UT · 30 ms 10:41:11 UT · 30 ms 10:29:00 UT · 60 ms · over-exposed 10:31:14 UT · 60 ms · over-exposed 10:38:36 UT · 60 ms · over-exposed 10:41:55 UT · 60 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.