Images 25.05.2021 · Istanbul University Observatory Solar Observations

Solar Images Tuesday, 25 May 2021

‹ 24.05.2021 2021 26.05.2021 ›

Photosphere sunspot drawing and RDS evaluation

High-resolution scan (3230 px)

Time: 07:05 UT
Observer: Korhan YELKENCİ
g: 4
f: 28
R: 68
Seeing: 3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · AX_ – 6

Group 2 · AX_ – 1

Group 3 · EHI – 20

Group 4 · AX_ – 1

RDS data file (.gzd)

[Gözlem]
Tarih=25.05.2021
Saat=07:05
Gözlemci=Korhan YELKENCİ
KontrolEden=Oğuzhan ÇAKIR
Durumaçısı=-17.75
Enlemaçısı=-1.47
Boylamaçısı=177.17
Boylamfark=3
GKalite=3
GDurum=K.T
Kuzeyaçısı=-0.5
Sırano=19177
AyRasatNo=6
RasatÖnceki=24.05.2021
RasatSonraki=26.05.2021

[Leke Grupları]
Grupsayısı=4:4:0
LekeSayısı=28:28:0
RölatifSayı=68:68:0
01=AX_ 06 +23.282 +39.175 216.345 +0.000 0000 0 +24.334 +39.864 +22.229 +38.485 +23.282 +39.364 +23.282 +38.986
02=AX_ 01 +20.998 +30.601 207.771 -1.000 0000 0 +20.998 +30.601 +20.998 +30.601
03=EHI 20 +20.233 +12.486 189.656 20.720 0000 0 +22.897 +19.275 +17.569 +05.698 +22.697 +19.750 +17.769 +05.898
04=AX_ 01 +16.850 -36.856 140.314 -1.000 0000 0 +16.850 -36.856 +16.850 -36.856

20210525.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 →

2021/20210525_ky · KY · 12 frames · 257.1 MB · 07:19:37–07:25:07 UT

07:23:07 UT · 40 ms