Images 17.02.2023 · Istanbul University Observatory Solar Observations

Solar Images Friday, 17 February 2023

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Photosphere sunspot drawing and RDS evaluation

High-resolution scan (3232 px)

Time: 07:30 UT
Observer: Başar COŞKUNOĞLU
g: 5
f: 34
R: 84
Seeing: 3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · HS_ – 1

Group 2 · CKI – 27

Group 3 · HS_ – 2

Group 4 · HH_ – 3

Group 5 · HS_ – 1

RDS data file (.gzd)

[Gözlem]
Tarih=17.02.2023
Saat=07:30
Gözlemci=Başar COŞKUNOĞLU
KontrolEden=Ergün EGE
Durumaçısı=-18.04
Enlemaçısı=-6.9
Boylamaçısı=102
Boylamfark=2
GKalite=3
GDurum=B.A
Kuzeyaçısı=-0.3
Sırano=19657
AyRasatNo=12
RasatÖnceki=16.02.2023
RasatSonraki=18.02.2023

[Leke Grupları]
Grupsayısı=5:3:2
LekeSayısı=34:30:4
RölatifSayı=84:60:24
01=HS_ 01 +23.354 +62.207 164.207 +0.000 0000 0 +23.900 +63.368 +22.809 +61.460 +23.354 +62.661 +23.354 +61.753
02=CKI 27 +09.614 +09.686 111.686 +0.000 0000 0 +11.493 +14.667 +07.735 +04.705 +09.614 +14.467 +09.614 +04.905
03=HS_ 02 +24.388 -66.939 035.610 +0.000 0000 0 +26.697 -64.798 +22.790 -69.790 +24.388 -64.943 +24.388 -68.935
04=HH_ 03 -13.478 +34.933 136.933 +0.000 0000 0 -12.177 +36.316 -14.778 +33.550 -13.478 +35.816 -13.478 +34.500
05=HS_ 01 -14.399 +18.255 120.255 +0.000 0000 0 -13.446 +19.456 -15.352 +17.540 -14.399 +18.713 -14.399 +17.797

20230217.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 →

2023/20230217_bc · BC · 2 frames · 42.9 MB · 07:45:45–07:47:15 UT

07:47:15 UT · 60 ms

07:45:45 UT · 60 ms

Coronado H-α animations from frame sequences

No Coronado observation for this day.