Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Friday, 26 May 2023

‹ 25.05.2023 2023 27.05.2023 ›

Photosphere sunspot drawing and RDS evaluation

26.05.2023 photosphere drawing

High-resolution scan (3222 px)

Time
10:30 UT
Observer
Başar COŞKUNOĞLU
g
7
f
58
R
128
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · HS_ – 7Group 1 · HS_ – 7 Group 2 · CSI – 14Group 2 · CSI – 14 Group 3 · HK_ – 7Group 3 · HK_ – 7 Group 4 · HS_ – 1Group 4 · HS_ – 1 Group 5 · HK_ – 2Group 5 · HK_ – 2 Group 6 · AX_ – 2Group 6 · AX_ – 2 Group 7 · DAI – 25Group 7 · DAI – 25
RDS data file (.gzd) 
[Gözlem]
Tarih=26.05.2023
Saat=10:30
Gözlemci=Başar COŞKUNOĞLU
KontrolEden=Ergün EGE
Durumaçısı=-17.52
Enlemaçısı=-1.4
Boylamaçısı=246.96
Boylamfark=1
GKalite=3
GDurum=B.A
Kuzeyaçısı=-0.3
Sırano=19719
AyRasatNo=18
RasatÖnceki=25.05.2023
RasatSonraki=27.05.2023

[Leke Grupları]
Grupsayısı=7:4:3
LekeSayısı=58:29:29
RölatifSayı=128:69:59
01=HS_ 07 +16.141 +36.420 283.200 +0.000 0000 0 +17.870 +37.570 +15.195 +34.515 +16.141 +37.447 +16.141 +35.392
02=CSI 14 +17.837 +26.851 273.811 +0.000 0000 0 +18.807 +29.591 +16.867 +24.111 +17.837 +29.391 +17.837 +24.311
03=HK_ 07 +21.454 +16.991 263.951 +0.000 0000 0 +22.990 +18.455 +19.919 +15.527 +21.454 +17.955 +21.454 +16.270
04=HS_ 01 +23.357 +05.846 252.806 +0.000 0000 0 +24.455 +06.784 +22.259 +04.909 +23.357 +06.284 +23.357 +05.409
05=HK_ 02 -19.435 +35.127 282.870 +0.000 0000 0 -17.910 +37.240 -21.779 +33.130 -19.435 +36.682 -19.435 +33.572
06=AX_ 02 -23.203 +16.744 263.704 +0.000 0000 0 -21.948 +17.967 -24.457 +15.521 +00.000 +00.000 +00.000 +00.000
07=DAI 25 -16.236 -15.504 231.456 +0.000 0000 0 -14.900 -09.897 -17.573 -21.110 -16.236 -10.970 -16.236 -20.910
20230526.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 →

2023/20230526_bc · BC · 1 frames · 21.4 MB · 10:33:35 UT

10:33:35 UT · 40 ms

Coronado H-α animations from frame sequences

No Coronado observation for this day.