Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Monday, 13 September 2021

‹ 12.09.2021 2021 14.09.2021 ›

Photosphere sunspot drawing and RDS evaluation

13.09.2021 photosphere drawing

High-resolution scan (3233 px)

Time
08:35 UT
Observer
Hikmet ÇAKMAK
g
3
f
17
R
47
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · AX_ – 1Group 1 · AX_ – 1 Group 2 · CAO – 8Group 2 · CAO – 8 Group 3 · CAI – 8Group 3 · CAI – 8
RDS data file (.gzd) 
[Gözlem]
Tarih=13.09.2021
Saat=08:35
Gözlemci=Hikmet ÇAKMAK
KontrolEden=Korhan YELKENCİ
Durumaçısı=23.77
Enlemaçısı=7.23
Boylamaçısı=148.23
Boylamfark=2
GKalite=3
GDurum=G.T , H.S
Kuzeyaçısı=-0.3
Sırano=19274
AyRasatNo=11
RasatÖnceki=12.09.2021
RasatSonraki=14.09.2021

[Leke Grupları]
Grupsayısı=3:1:2
LekeSayısı=17:1:16
RölatifSayı=47:11:36
01=AX_ 01 +22.386 -65.150 083.800 -1.000 0000 0 +22.386 -65.150 +22.386 -65.150
02=CAO 08 -19.409 +67.850 215.315 23.966 0000 0 -16.741 +70.308 -22.760 +63.862 -18.364 +68.381 -20.380 +64.610
03=CAI 08 -19.136 +49.310 197.261 04.797 0000 0 -17.659 +50.936 -20.613 +47.126 -18.569 +50.342 -18.784 +47.780
20210913.gzd

Chromosphere (H-α) FITS frames

H-α

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 →

2021/20210913_hc · HC · 8 frames · 171.4 MB · 08:36:51–09:04:35 UT

08:52:27 UT · 40 ms 09:00:57 UT · 40 ms 08:36:51 UT · 40 ms 09:04:35 UT · 30 ms 08:40:19 UT · 80 ms · over-exposed 09:03:43 UT · 60 ms · over-exposed 09:01:49 UT · 40 ms 08:58:41 UT

Coronado H-α animations from frame sequences

No Coronado observation for this day.