Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Wednesday, 26 July 2023

‹ 25.07.2023 2023 27.07.2023 ›

Photosphere sunspot drawing and RDS evaluation

26.07.2023 photosphere drawing

High-resolution scan (3227 px)

Time
08:35 UT
Observer
H.ÇAKMAK=B.C.
g
9
f
41
R
131
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · ?__ – 2Group 1 · ?__ – 2 Group 2 · DAC – 5Group 2 · DAC – 5 Group 3 · AX_ – 2Group 3 · AX_ – 2 Group 4 · CAO – 8Group 4 · CAO – 8 Group 5 · BXI – 6Group 5 · BXI – 6 Group 6 · ?__ – 1Group 6 · ?__ – 1 Group 7 · DAO – 2Group 7 · DAO – 2 Group 8 · CRI – 4Group 8 · CRI – 4 Group 9 · CAI – 11Group 9 · CAI – 11
RDS data file (.gzd) 
[Gözlem]
Tarih=26.07.2023
Saat=08:35
Gözlemci=H.ÇAKMAK=B.C.
KontrolEden=Burçin TANIK
Durumaçısı=8.38
Enlemaçısı=5.3
Boylamaçısı=160.72
Boylamfark=2
GKalite=3
GDurum=G.T , H.S
Kuzeyaçısı=-0.5
Sırano=19774
AyRasatNo=25
RasatÖnceki=25.07.2023
RasatSonraki=27.07.2023

[Leke Grupları]
Grupsayısı=9:5:4
LekeSayısı=41:23:18
RölatifSayı=131:73:58
01=?__ 02 +09.505 +79.337 240.570 +0.000 0000 0 +10.384 +82.107 +08.626 +76.566 +09.505 +81.607 +09.505 +77.660
02=DAC 05 +22.657 +67.908 228.628 26.626 0000 0 +24.903 +71.741 +20.412 +64.740 +21.235 +70.570 +23.751 +65.270
03=AX_ 02 +19.366 +08.644 169.364 +0.000 0000 0 +19.800 +08.904 +18.931 +08.383 +19.366 +08.405 +19.366 +08.884
04=CAO 08 +13.230 +08.420 169.140 03.606 0000 0 +15.813 +14.295 +10.647 +02.544 +14.315 +13.100 +13.693 +03.187
05=BXI 06 +11.576 -70.557 090.163 19.970 0000 0 +12.752 -67.940 +10.400 -73.174 +10.837 -68.764 +12.252 -72.661
06=?__ 01 -25.987 +70.573 231.293 +0.000 0000 0 -25.404 +71.467 -26.569 +69.679 -25.987 +70.967 -25.987 +70.179
07=DAO 02 -07.901 +36.950 196.815 17.972 0000 0 -06.398 +38.695 -09.404 +33.496 -08.297 +37.759 -07.195 +34.361
08=CRI 04 -14.604 +07.726 168.446 07.755 0000 0 -13.582 +09.974 -15.625 +05.477 -14.796 +09.430 -14.295 +05.744
09=CAI 11 -12.818 -44.602 116.118 17.947 0000 0 -08.615 -34.598 -17.200 -54.606 -10.310 -36.518 -15.292 -53.340
20230726.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 →

2023/20230726_hc · HC · 3 frames · 64.3 MB · 08:49:01–09:11:31 UT

08:52:16 UT · 60 ms · over-exposed 09:11:31 UT · 30 ms 08:49:01 UT · 30 ms

Coronado H-α animations from frame sequences

No Coronado observation for this day.