Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Monday, 26 July 2021

‹ 25.07.2021 2021 27.07.2021 ›

Photosphere sunspot drawing and RDS evaluation

26.07.2021 photosphere drawing

High-resolution scan (3231 px)

Time
08:05 UT
Observer
Hikmet ÇAKMAK
g
3
f
6
R
36
Seeing
4 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · BXO – 4Group 1 · BXO – 4 Group 2 · AX_ – 1Group 2 · AX_ – 1 Group 3 · AX_ – 1Group 3 · AX_ – 1
RDS data file (.gzd) 
[Gözlem]
Tarih=26.07.2021
Saat=08:05
Gözlemci=Hikmet ÇAKMAK
KontrolEden=Oğuzhan ÇAKIR
Durumaçısı=8.57
Enlemaçısı=5.34
Boylamaçısı=76.09
Boylamfark=2
GKalite=4
GDurum=G.T
Kuzeyaçısı=-0.5
Sırano=19227
AyRasatNo=25
RasatÖnceki=25.07.2021
RasatSonraki=27.07.2021

[Leke Grupları]
Grupsayısı=3:1:2
LekeSayısı=6:4:2
RölatifSayı=36:14:22
01=BXO 04 +25.131 +05.434 081.524 18.280 0000 0 +26.935 +10.820 +23.327 +00.786 +23.823 +09.281 +26.432 +01.233
02=AX_ 01 -27.590 -09.335 066.755 -1.000 0000 0 -27.590 -09.335 -27.590 -09.335
03=AX_ 01 -23.999 -26.475 049.615 -1.000 0000 0 -23.999 -26.475 -23.999 -26.475
20210726.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 →

2021/20210726_hc · HC · 7 frames · 150.0 MB · 08:09:26–08:38:54 UT

08:29:50 UT · 30 ms 08:11:04 UT · 30 ms 08:19:38 UT · 30 ms 08:20:59 UT · 70 ms · over-exposed 08:28:34 UT · 70 ms · over-exposed 08:38:54 UT · 70 ms · over-exposed 08:09:26 UT · 70 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.