Images 23.02.2023 · Istanbul University Observatory Solar Observations

Solar Images Thursday, 23 February 2023

‹ 22.02.2023 2023 24.02.2023 ›

Photosphere sunspot drawing and RDS evaluation

High-resolution scan (3234 px)

Time: 08:05 UT
Observer: Burçin TANIK
g: 4
f: 76
R: 116
Seeing: 3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · EAI – 16

Group 2 · BXI – 10

Group 3 · EKC – 37

Group 4 · CAI – 13

RDS data file (.gzd)

[Gözlem]
Tarih=23.02.2023
Saat=08:05
Gözlemci=Burçin TANIK
KontrolEden=Başar COŞKUNOĞLU
Durumaçısı=-19.89
Enlemaçısı=-7.1
Boylamaçısı=22.67
Boylamfark=2
GKalite=3
GDurum=B.A
Kuzeyaçısı=-0.4
Sırano=19663
AyRasatNo=18
RasatÖnceki=22.02.2023
RasatSonraki=24.02.2023

[Leke Grupları]
Grupsayısı=4:3:1
LekeSayısı=76:63:13
RölatifSayı=116:93:23
01=EAI 16 +23.783 +07.719 030.389 08.772 0000 0 +25.596 +14.134 +21.970 +01.303 +24.432 +12.790 +22.890 +02.739
02=BXI 10 +18.640 -18.980 003.690 22.381 0000 0 +19.744 -17.201 +17.536 -20.759 +17.868 -17.670 +18.805 -19.948
03=EKC 37 +24.282 -41.693 340.977 13.918 0000 0 +26.807 -34.745 +21.757 -48.641 +22.483 -36.190 +25.860 -46.761
04=CAI 13 -22.730 -17.116 005.554 16.230 0000 0 -20.152 -14.334 -23.993 -19.897 -22.210 -15.211 -23.234 -19.381

20230223.gzd

Chromosphere (H-α) FITS frames

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 →

2023/20230223_bto · BTO · 3 frames · 64.3 MB · 08:18:45–08:21:11 UT

08:18:45 UT · 30 ms

08:21:11 UT · 80 ms · over-exposed

08:19:50 UT · 80 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.