Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Friday, 20 October 2023

‹ 19.10.2023 2023 21.10.2023 ›

Photosphere sunspot drawing and RDS evaluation

20.10.2023 photosphere drawing

High-resolution scan (3224 px)

Time
09:29 UT
Observer
Başar COŞKUNOĞLU
g
5
f
16
R
66
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · HS_ – 1Group 1 · HS_ – 1 Group 2 · HS_ – 8Group 2 · HS_ – 8 Group 3 · BXO – 5Group 3 · BXO – 5 Group 4 · HS_ – 1Group 4 · HS_ – 1 Group 5 · AX_ – 1Group 5 · AX_ – 1
RDS data file (.gzd) 
[Gözlem]
Tarih=20.10.2023
Saat=09:29
Gözlemci=Başar COŞKUNOĞLU
KontrolEden=Hikmet ÇAKMAK
Durumaçısı=25.9
Enlemaçısı=5.5
Boylamaçısı=104.38
Boylamfark=1
GKalite=3
GDurum=
Kuzeyaçısı=-0.5
Sırano=19851
AyRasatNo=16
RasatÖnceki=19.10.2023
RasatSonraki=21.10.2023

[Leke Grupları]
Grupsayısı=5:3:2
LekeSayısı=16:14:2
RölatifSayı=66:44:22
01=HS_ 01 +03.246 +69.515 173.895 +0.000 0000 0 +03.967 +70.486 +02.525 +68.544 +03.246 +69.986 +03.246 +69.440
02=HS_ 08 +12.495 +41.977 146.357 +0.000 0000 0 +13.535 +43.588 +11.454 +40.365 +12.495 +43.890 +12.495 +40.866
03=BXO 05 +28.655 +29.329 133.709 +0.000 0000 0 +29.483 +31.510 +27.827 +27.607 +28.655 +30.851 +28.655 +27.807
04=HS_ 01 -09.225 -24.744 079.636 +0.000 0000 0 -08.372 -23.724 -10.780 -25.763 -09.225 -24.224 -09.225 -25.264
05=AX_ 01 -09.652 -38.270 066.110 -1.000 0000 0 -09.652 -38.270 -09.652 -38.270
20231020.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 →

2023/20231020_bc · BC · 6 frames · 128.6 MB · 09:38:05–09:44:06 UT

09:41:40 UT · 40 ms 09:38:05 UT · 40 ms 09:40:49 UT · 40 ms 09:44:06 UT · 60 ms · over-exposed 09:43:24 UT · 60 ms · over-exposed 09:42:48 UT · 60 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.