Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Friday, 11 August 2023

‹ 10.08.2023 2023 12.08.2023 ›

Photosphere sunspot drawing and RDS evaluation

11.08.2023 photosphere drawing

High-resolution scan (3220 px)

Time
10:30 UT
Observer
Başar COŞKUNOĞLU
g
5
f
42
R
92
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · BXO – 4Group 1 · BXO – 4 Group 2 · DSC – 20Group 2 · DSC – 20 Group 3 · BXI – 11Group 3 · BXI – 11 Group 4 · HS_ – 5Group 4 · HS_ – 5 Group 5 · AX_ – 2Group 5 · AX_ – 2
RDS data file (.gzd) 
[Gözlem]
Tarih=11.08.2023
Saat=10:30
Gözlemci=Başar COŞKUNOĞLU
KontrolEden=Olcay PLEVNE
Durumaçısı=14.62
Enlemaçısı=6.42
Boylamaçısı=308.06
Boylamfark=1
GKalite=3
GDurum=B.A
Kuzeyaçısı=0.0
Sırano=19789
AyRasatNo=10
RasatÖnceki=10.08.2023
RasatSonraki=12.08.2023

[Leke Grupları]
Grupsayısı=5:3:2
LekeSayısı=42:35:7
RölatifSayı=92:65:27
01=BXO 04 +26.168 +35.300 343.900 +0.000 0000 0 +27.460 +37.357 +25.290 +32.702 +26.168 +37.157 +26.168 +32.902
02=DSC 20 +14.978 +22.500 330.560 15.780 0000 0 +17.300 +25.698 +12.657 +19.302 +14.979 +23.851 +13.920 +20.102
03=BXI 11 +19.195 -04.272 303.788 21.837 0000 0 +20.409 -01.163 +17.982 -07.381 +19.819 -02.279 +18.289 -06.100
04=HS_ 05 -22.814 +32.360 340.420 +0.000 0000 0 -20.519 +34.703 -25.109 +30.170 -22.814 +34.126 -22.814 +30.594
05=AX_ 02 -13.378 -03.901 304.159 -1.000 0000 0 -13.378 -03.901 -13.378 -03.901
20230811.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 →

2023/20230811_bc · BC · 7 frames · 150.0 MB · 10:42:33–10:51:17 UT

10:48:43 UT · 40 ms 10:45:02 UT · 40 ms 10:49:19 UT · 40 ms 10:42:33 UT · 40 ms 10:50:02 UT · 60 ms · over-exposed 10:50:38 UT · 60 ms · over-exposed 10:51:17 UT · 60 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.