Images 24.10.2023 · Istanbul University Observatory Solar Observations

Photosphere sunspot drawing and RDS evaluation

High-resolution scan (3230 px)

Time: 06:40 UT
Observer: Korhan YELKENCİ
g: 3
f: 11
R: 41
Seeing: 3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · AX_ – 4

Group 2 · HS_ – 2

Group 3 · BXI – 5

RDS data file (.gzd)

[Gözlem]
Tarih=24.10.2023
Saat=06:40
Gözlemci=Korhan YELKENCİ
KontrolEden=Başar COŞKUNOĞLU
Durumaçısı=25.56
Enlemaçısı=5.16
Boylamaçısı=53.17
Boylamfark=3
GKalite=3
GDurum=K.T
Kuzeyaçısı=-0.2
Sırano=19855
AyRasatNo=20
RasatÖnceki=23.10.2023
RasatSonraki=27.10.2023

[Leke Grupları]
Grupsayısı=3:1:2
LekeSayısı=11:4:7
RölatifSayı=41:14:27
01=AX_ 04 +24.200 +16.574 069.744 +0.000 0000 0 +24.699 +17.984 +23.342 +15.164 +24.200 +17.484 +24.200 +15.664
02=HS_ 02 -09.504 +27.473 080.643 +0.000 0000 0 -08.765 +28.440 -10.243 +26.902 -09.504 +27.742 -09.504 +27.204
03=BXI 05 -22.459 -03.170 050.000 25.874 0000 0 -21.481 -01.411 -23.438 -04.929 -21.712 -01.652 -23.322 -04.786

20231024.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 →

2023/20231024_ky · KY · 26 frames · 460.6 MB · 07:26:32–07:38:26 UT