Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Tuesday, 19 September 2023

‹ 18.09.2023 2023 20.09.2023 ›

Photosphere sunspot drawing and RDS evaluation

19.09.2023 photosphere drawing

High-resolution scan (3230 px)

Time
08:15 UT
Observer
Korhan YELKENCİ
g
11
f
80
R
190
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · CAI – 2Group 1 · CAI – 2 Group 2 · CAI – 7Group 2 · CAI – 7 Group 3 · DAI – 25Group 3 · DAI – 25 Group 4 · CAI – 4Group 4 · CAI – 4 Group 5 · BXI – 4Group 5 · BXI – 4 Group 6 · AX_ – 2Group 6 · AX_ – 2 Group 7 · DAI – 11Group 7 · DAI – 11 Group 8 · HS_ – 1Group 8 · HS_ – 1 Group 9 · CAI – 20Group 9 · CAI – 20 Group 10 · BXI – 3Group 10 · BXI – 3 Group 11 · AX_ – 1Group 11 · AX_ – 1
RDS data file (.gzd) 
[Gözlem]
Tarih=19.09.2023
Saat=08:15
Gözlemci=Korhan YELKENCİ
KontrolEden=Korhan YELKENCİ
Durumaçısı=24.66
Enlemaçısı=7.14
Boylamaçısı=154.1
Boylamfark=2
GKalite=3
GDurum=H.S
Kuzeyaçısı=-0.5
Sırano=19826
AyRasatNo=18
RasatÖnceki=18.09.2023
RasatSonraki=20.09.2023

[Leke Grupları]
Grupsayısı=11:8:3
LekeSayısı=80:56:24
RölatifSayı=190:136:54
01=CAI 02 +23.662 +81.903 236.300 +0.000 0000 0 +24.408 +86.819 +22.916 +76.987 +23.662 +86.319 +23.662 +77.487
02=CAI 07 +12.312 +54.119 208.219 13.500 0000 0 +13.367 +58.610 +11.257 +50.178 +13.167 +57.779 +11.457 +50.378
03=DAI 25 +20.824 +39.680 193.780 27.507 0000 0 +23.123 +43.933 +18.524 +35.426 +22.923 +43.733 +18.724 +35.626
04=CAI 04 +28.892 +15.647 169.747 22.318 0000 0 +30.152 +18.434 +27.632 +12.860 +29.952 +18.234 +27.832 +13.600
05=BXI 04 +28.656 -12.635 141.465 +0.000 0000 0 +29.372 -10.871 +27.940 -14.398 +28.656 -11.372 +28.656 -13.899
06=AX_ 02 +08.992 -21.190 132.910 +0.000 0000 0 +10.162 -20.966 +07.823 -21.414 +08.992 -21.466 +08.992 -20.914
07=DAI 11 +09.892 -49.376 104.724 25.720 0000 0 +12.866 -43.465 +06.918 -55.287 +12.556 -43.665 +07.118 -55.630
08=HS_ 01 +18.215 -71.195 082.905 +0.000 0000 0 +19.100 -70.147 +17.429 -72.243 +18.215 -70.647 +18.215 -71.743
09=CAI 20 -17.267 +18.572 172.672 30.118 0000 0 -15.470 +22.268 -19.487 +14.875 -15.247 +22.680 -19.287 +15.750
10=BXI 03 -23.233 -53.788 100.312 31.712 0000 0 -21.824 -55.947 -24.641 -51.629 -22.240 -51.829 -24.441 -55.747
11=AX_ 01 -09.380 -78.370 076.630 -1.000 0000 0 -09.380 -78.370 -09.380 -78.370
20230919.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 →

2023/20230919_ky · KY · 14 frames · 299.9 MB · 08:54:09–09:00:40 UT

08:55:10 UT · 30 ms 08:58:10 UT · 40 ms · over-exposed 08:58:40 UT · 30 ms 08:54:40 UT · 40 ms · over-exposed 08:54:09 UT · 60 ms · over-exposed 08:57:39 UT · 60 ms · over-exposed 08:59:10 UT · 60 ms 08:59:40 UT · 40 ms 09:00:10 UT · 20 ms 09:00:40 UT 08:55:40 UT · 60 ms 08:56:10 UT · 40 ms 08:56:40 UT · 20 ms 08:57:10 UT

Coronado H-α animations from frame sequences

No Coronado observation for this day.