Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Saturday, 4 September 2021

‹ 03.09.2021 2021 05.09.2021 ›

Photosphere sunspot drawing and RDS evaluation

04.09.2021 photosphere drawing

High-resolution scan (3228 px)

Time
08:40 UT
Observer
Başar COŞKUNOĞLU
g
5
f
23
R
73
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · CSI – 6Group 1 · CSI – 6 Group 2 · AX_ – 3Group 2 · AX_ – 3 Group 3 · AX_ – 3Group 3 · AX_ – 3 Group 4 · CSI – 8Group 4 · CSI – 8 Group 5 · HS_ – 3Group 5 · HS_ – 3
RDS data file (.gzd) 
[Gözlem]
Tarih=4.09.2021
Saat=08:40
Gözlemci=Başar COŞKUNOĞLU
KontrolEden=Talar YONTAN
Durumaçısı=21.9
Enlemaçısı=7.23
Boylamaçısı=267.03
Boylamfark=2
GKalite=3
GDurum=G.T
Kuzeyaçısı=-0.2
Sırano=19267
AyRasatNo=4
RasatÖnceki=03.09.2021
RasatSonraki=05.09.2021

[Leke Grupları]
Grupsayısı=5:2:3
LekeSayısı=23:9:14
RölatifSayı=73:29:44
01=CSI 06 +25.970 -19.737 247.293 +0.000 0000 0 +27.311 -17.332 +24.630 -22.143 +25.970 -17.532 +25.970 -21.943
02=AX_ 03 +23.870 -35.316 231.714 +0.000 0000 0 +23.545 -34.140 +22.629 -36.492 +23.870 -34.640 +23.870 -35.992
03=AX_ 03 -16.856 +60.868 327.898 +0.000 0000 0 -16.252 +61.625 -17.461 +60.110 -16.856 +61.125 -16.856 +60.611
04=CSI 08 -13.539 -12.692 254.338 +0.000 0000 0 -12.360 -09.744 -15.410 -15.641 -13.539 -09.944 -13.539 -15.441
05=HS_ 03 -16.500 -72.600 194.970 +0.000 0000 0 -15.107 -69.376 -16.993 -74.744 -16.500 -70.416 -16.500 -74.784
20210904.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 →

2021/20210904_bc · BC · 6 frames · 128.6 MB · 08:50:39–08:55:23 UT

08:53:29 UT · 40 ms 08:50:39 UT · 40 ms 08:52:52 UT · 40 ms 08:54:46 UT · 60 ms · over-exposed 08:54:06 UT · 60 ms · over-exposed 08:55:23 UT · 60 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.