Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Monday, 31 July 2023

‹ 30.07.2023 2023 01.08.2023 ›

Photosphere sunspot drawing and RDS evaluation

31.07.2023 photosphere drawing

High-resolution scan (3229 px)

Time
10:34 UT
Observer
Ergün EGE
g
11
f
48
R
158
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · AX_ – 1Group 1 · AX_ – 1 Group 2 · ESI – 13Group 2 · ESI – 13 Group 3 · CSI – 7Group 3 · CSI – 7 Group 4 · AX_ – 1Group 4 · AX_ – 1 Group 5 · BXO – 3Group 5 · BXO – 3 Group 6 · HA_ – 1Group 6 · HA_ – 1 Group 7 · DAI – 14Group 7 · DAI – 14 Group 8 · AX_ – 3Group 8 · AX_ – 3 Group 9 · AX_ – 1Group 9 · AX_ – 1 Group 10 · HS_ – 1Group 10 · HS_ – 1 Group 11 · BXO – 3Group 11 · BXO – 3
RDS data file (.gzd) 
[Gözlem]
Tarih=31.07.2023
Saat=10:34
Gözlemci=Ergün EGE
KontrolEden=Hikmet ÇAKMAK
Durumaçısı=10.45
Enlemaçısı=5.7
Boylamaçısı=93.49
Boylamfark=1
GKalite=3
GDurum=B.A , K.T
Kuzeyaçısı=-0.5
Sırano=19779
AyRasatNo=30
RasatÖnceki=30.07.2023
RasatSonraki=01.08.2023

[Leke Grupları]
Grupsayısı=11:6:5
LekeSayısı=48:26:22
RölatifSayı=158:86:72
01=AX_ 01 +14.416 +78.683 172.173 +0.000 0000 0 +14.861 +80.840 +13.972 +77.283 +14.416 +79.962 +14.416 +77.404
02=ESI 13 +11.321 -01.882 091.608 +0.000 0000 0 +14.486 +04.641 +08.156 -08.405 +11.321 +04.441 +11.321 -08.205
03=CSI 07 +21.709 -26.289 067.201 +0.000 0000 0 +23.936 -23.430 +19.482 -29.535 +21.709 -23.243 +21.709 -29.335
04=AX_ 01 +17.330 -33.671 059.819 +0.000 0000 0 +17.236 -33.302 +16.830 -34.390 +17.330 -33.627 +17.330 -33.715
05=BXO 03 +09.226 -57.797 035.693 +0.000 0000 0 +10.141 -56.950 +08.312 -59.499 +09.226 -56.295 +09.226 -59.299
06=HA_ 01 +23.214 -59.288 034.202 +0.000 0000 0 +24.457 -58.272 +21.971 -60.303 +23.214 -58.772 +23.214 -59.803
07=DAI 14 -09.664 +30.707 124.197 +0.000 0000 0 -07.376 +35.447 -11.953 +25.967 -09.664 +35.247 -09.664 +26.167
08=AX_ 03 -16.559 +14.176 107.666 +0.000 0000 0 -15.488 +14.793 -17.631 +13.558 -16.559 +14.293 -16.559 +14.580
09=AX_ 01 -22.755 -16.646 076.844 +0.000 0000 0 -22.381 -16.401 -23.130 -16.890 -22.755 -16.902 -22.755 -16.390
10=HS_ 01 -08.844 -29.851 063.639 +0.000 0000 0 -08.249 -29.680 -09.440 -30.634 -08.844 -29.874 -08.844 -29.828
11=BXO 03 -18.672 -41.936 051.554 +0.000 0000 0 -17.543 -39.860 -19.801 -44.120 -18.672 -40.600 -18.672 -43.812
20230731.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 →

2023/20230731_ee · EE · 5 frames · 107.1 MB · 10:23:04–10:27:26 UT

10:25:38 UT · 40 ms 10:24:53 UT · 30 ms 10:26:26 UT · 50 ms 10:23:04 UT · 30 ms 10:27:26 UT · 60 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.