Images 23.02.2021 · Istanbul University Observatory Solar Observations

Photosphere sunspot drawing and RDS evaluation

High-resolution scan (3231 px)

Time: 07:35 UT
Observer: Süleyman FİŞEK
g: 2
f: 26
R: 46
Seeing: 3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · DAI – 13

Group 2 · DAI – 13

RDS data file (.gzd)

[Gözlem]
Tarih=23.02.2021
Saat=07:35
Gözlemci=Süleyman FİŞEK
KontrolEden=Süleyman FİŞEK
Durumaçısı=-20.03
Enlemaçısı=-7.11
Boylamaçısı=298.08
Boylamfark=2
GKalite=3
GDurum=G.T , H.S
Kuzeyaçısı=-0.4
Sırano=19131
AyRasatNo=13
RasatÖnceki=22.02.2021
RasatSonraki=25.02.2021

[Leke Grupları]
Grupsayısı=2:1:1
LekeSayısı=26:13:13
RölatifSayı=46:23:23
01=DAI 13 +17.728 +08.909 306.989 24.436 0000 0 +19.344 +11.655 +16.112 +06.163 +16.763 +10.843 +18.763 +06.436
02=DAI 13 -23.543 +01.551 299.631 08.835 0000 0 -21.834 +03.999 -25.252 -00.897 -23.892 +03.287 -23.364 -00.113

20210223.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 →

2021/20210223_sf · SF · 21 frames · 449.9 MB · 07:48:48–08:09:16 UT