Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Wednesday, 20 December 2023

‹ 19.12.2023 2023 22.12.2023 ›

Photosphere sunspot drawing and RDS evaluation

20.12.2023 photosphere drawing

High-resolution scan (3218 px)

Time
09:30 UT
Observer
Olcay PLEVNE
g
9
f
72
R
162
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · CAI – 15Group 1 · CAI – 15 Group 2 · CAO – 17Group 2 · CAO – 17 Group 3 · CAI – 8Group 3 · CAI – 8 Group 4 · DSI – 4Group 4 · DSI – 4 Group 5 · AX_ – 1Group 5 · AX_ – 1 Group 6 · CSI – 10Group 6 · CSI – 10 Group 7 · BXI – 4Group 7 · BXI – 4 Group 8 · DAI – 12Group 8 · DAI – 12 Group 9 · HS_ – 1Group 9 · HS_ – 1
RDS data file (.gzd) 
[Gözlem]
Tarih=20.12.2023
Saat=09:30
Gözlemci=Olcay PLEVNE
KontrolEden=Hikmet ÇAKMAK
Durumaçısı=7.86
Enlemaçısı=-1.52
Boylamaçısı=20.29
Boylamfark=1
GKalite=3
GDurum=K.T
Kuzeyaçısı=0.0
Sırano=19886
AyRasatNo=9
RasatÖnceki=19.12.2023
RasatSonraki=22.12.2023

[Leke Grupları]
Grupsayısı=9:4:5
LekeSayısı=72:44:28
RölatifSayı=162:84:78
01=CAI 15 +08.599 +05.131 025.421 +0.000 0000 0 +10.104 +08.831 +07.930 +01.431 +08.599 +08.631 +08.599 +01.631
02=CAO 17 +12.435 -14.842 005.448 +0.000 0000 0 +14.466 -12.140 +10.404 -17.544 +12.435 -12.340 +12.435 -17.344
03=CAI 08 +14.753 -37.688 342.602 +0.000 0000 0 +16.168 -34.990 +13.338 -41.277 +14.753 -34.299 +14.753 -41.770
04=DSI 04 +08.341 -58.958 321.332 +0.000 0000 0 +10.850 -52.773 +06.597 -65.143 +08.341 -52.973 +08.341 -64.943
05=AX_ 01 -00.790 +83.710 103.361 -1.000 0000 0 -00.790 +83.710 -00.790 +83.710
06=CSI 10 -08.992 +52.248 072.538 +0.000 0000 0 -06.927 +55.393 -11.580 +49.103 -08.992 +55.193 -08.992 +49.303
07=BXI 04 -11.555 +44.910 065.200 +0.000 0000 0 -10.477 +45.934 -12.633 +43.886 +00.000 +00.000 +00.000 +00.000
08=DAI 12 -20.288 -35.420 345.248 +0.000 0000 0 -18.220 -29.790 -22.553 -40.293 -20.288 -29.990 -20.288 -40.930
09=HS_ 01 -20.239 -78.343 301.947 +0.000 0000 0 -19.257 -74.133 -21.221 -82.553 -20.239 -74.633 -20.239 -82.530
20231220.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 →

2023/20231220_op · OP · 3 frames · 64.3 MB · 09:22:10–09:26:07 UT

09:24:36 UT · 40 ms 09:22:10 UT · 40 ms 09:26:07 UT · 60 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.