Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Saturday, 11 September 2021

‹ 08.09.2021 2021 12.09.2021 ›

Photosphere sunspot drawing and RDS evaluation

11.09.2021 photosphere drawing

High-resolution scan (3231 px)

Time
08:25 UT
Observer
Hikmet ÇAKMAK
g
4
f
48
R
88
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · HS_ – 1Group 1 · HS_ – 1 Group 2 · CAI – 16Group 2 · CAI – 16 Group 3 · CKI – 25Group 3 · CKI – 25 Group 4 · BXO – 6Group 4 · BXO – 6
RDS data file (.gzd) 
[Gözlem]
Tarih=11.09.2021
Saat=08:25
Gözlemci=Hikmet ÇAKMAK
KontrolEden=Oğuzhan ÇAKIR
Durumaçısı=23.39
Enlemaçısı=7.24
Boylamaçısı=174.73
Boylamfark=2
GKalite=3
GDurum=G.T , B.A
Kuzeyaçısı=-0.4
Sırano=19272
AyRasatNo=9
RasatÖnceki=08.09.2021
RasatSonraki=12.09.2021

[Leke Grupları]
Grupsayısı=4:1:3
LekeSayısı=48:1:47
RölatifSayı=88:11:77
01=HS_ 01 +25.176 +77.439 252.169 +0.000 0000 0 +26.167 +78.733 +24.186 +76.144 +25.176 +78.234 +25.176 +76.645
02=CAI 16 -19.825 +39.697 214.427 35.530 0000 0 -17.550 +42.830 -22.596 +36.564 -18.310 +41.825 -20.992 +38.620
03=CKI 25 -18.838 +20.876 195.606 06.832 0000 0 -16.397 +24.477 -21.279 +17.275 -17.870 +23.199 -18.394 +18.820
04=BXO 06 -34.119 +17.852 192.582 04.554 0000 0 -33.269 +20.635 -34.968 +15.690 -34.223 +19.895 -33.872 +15.488
20210911.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 →

2021/20210911_hc · HC · 8 frames · 171.4 MB · 08:20:37–08:39:25 UT

08:26:53 UT · 40 ms 08:37:37 UT · 40 ms 08:25:19 UT · 40 ms 08:39:25 UT · 30 ms 08:35:17 UT · 60 ms · over-exposed 08:36:19 UT · 65 ms · over-exposed 08:29:38 UT · 80 ms · over-exposed 08:20:37 UT

Coronado H-α animations from frame sequences

No Coronado observation for this day.