Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Sunday, 17 September 2023

‹ 16.09.2023 2023 18.09.2023 ›

Photosphere sunspot drawing and RDS evaluation

17.09.2023 photosphere drawing

High-resolution scan (3220 px)

Time
11:24 UT
Observer
Başar COŞKUNOĞLU
g
6
f
38
R
98
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · BXI – 5Group 1 · BXI – 5 Group 2 · CSI – 15Group 2 · CSI – 15 Group 3 · AX_ – 5Group 3 · AX_ – 5 Group 4 · CSI – 8Group 4 · CSI – 8 Group 5 · CHO – 4Group 5 · CHO – 4 Group 6 · AX_ – 1Group 6 · AX_ – 1
RDS data file (.gzd) 
[Gözlem]
Tarih=17.09.2023
Saat=11:24
Gözlemci=Başar COŞKUNOĞLU
KontrolEden=Ergün EGE
Durumaçısı=24.38
Enlemaçısı=7.17
Boylamaçısı=178.76
Boylamfark=0
GKalite=3
GDurum=
Kuzeyaçısı=-0.5
Sırano=19824
AyRasatNo=16
RasatÖnceki=16.09.2023
RasatSonraki=18.09.2023

[Leke Grupları]
Grupsayısı=6:5:1
LekeSayısı=38:37:1
RölatifSayı=98:87:11
01=BXI 05 +23.221 +57.580 235.818 +0.000 0000 0 +23.963 +59.528 +22.478 +54.589 +23.221 +59.550 +23.221 +55.611
02=CSI 15 +11.635 +26.969 205.729 +0.000 0000 0 +12.907 +31.305 +10.364 +22.633 +11.635 +31.105 +11.635 +22.833
03=AX_ 05 +20.606 +13.153 191.913 +0.000 0000 0 +21.445 +14.445 +19.768 +11.862 +00.000 +00.000 +00.000 +00.000
04=CSI 08 +27.934 -07.840 170.920 34.868 0000 0 +30.101 -05.386 +25.766 -10.294 +29.329 -06.512 +26.897 -10.600
05=CHO 04 +08.608 -79.515 099.245 13.866 0000 0 +10.955 -72.485 +06.261 -86.544 +10.545 -73.938 +08.152 -83.686
06=AX_ 01 -12.675 +27.121 205.881 -1.000 0000 0 -12.675 +27.121 -12.675 +27.121
20230917.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 →

2023/20230917_bc · BC · 6 frames · 128.6 MB · 11:07:38–11:11:48 UT

11:09:41 UT · 40 ms 11:07:38 UT · 40 ms 11:08:46 UT · 40 ms 11:11:48 UT · 70 ms · over-exposed 11:10:27 UT · 70 ms · over-exposed 11:11:10 UT · 70 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.