Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Friday, 4 August 2023

‹ 03.08.2023 2023 05.08.2023 ›

Photosphere sunspot drawing and RDS evaluation

04.08.2023 photosphere drawing

High-resolution scan (3224 px)

Time
09:15 UT
Observer
O.PLEVNE=B.C.
g
9
f
31
R
121
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · HA_ – 5Group 1 · HA_ – 5 Group 2 · BXI – 4Group 2 · BXI – 4 Group 3 · AX_ – 1Group 3 · AX_ – 1 Group 4 · CSI – 10Group 4 · CSI – 10 Group 5 · BXI – 2Group 5 · BXI – 2 Group 6 · DSO – 2Group 6 · DSO – 2 Group 7 · HS_ – 1Group 7 · HS_ – 1 Group 8 · AX_ – 2Group 8 · AX_ – 2 Group 9 · HS_ – 4Group 9 · HS_ – 4
RDS data file (.gzd) 
[Gözlem]
Tarih=4.08.2023
Saat=09:15
Gözlemci=O.PLEVNE=B.C.
KontrolEden=Korhan YELKENCİ
Durumaçısı=12
Enlemaçısı=5.98
Boylamaçısı=41.31
Boylamfark=2
GKalite=3
GDurum=K.T
Kuzeyaçısı=0.0
Sırano=19783
AyRasatNo=4
RasatÖnceki=03.08.2023
RasatSonraki=05.08.2023

[Leke Grupları]
Grupsayısı=9:6:3
LekeSayısı=31:24:7
RölatifSayı=121:84:37
01=HA_ 05 +10.372 +52.493 093.803 +0.000 0000 0 +12.880 +55.930 +07.865 +49.894 +10.372 +55.110 +10.372 +49.975
02=BXI 04 +22.416 +25.132 066.442 +0.000 0000 0 +24.697 +27.505 +20.134 +22.759 +22.416 +27.305 +22.416 +22.959
03=AX_ 01 +17.500 +21.193 062.503 -1.000 0000 0 +17.500 +21.193 +17.500 +21.193
04=CSI 10 +09.982 -02.715 038.595 +0.000 0000 0 +11.650 +01.959 +08.315 -07.390 +09.982 +01.759 +09.982 -07.190
05=BXI 02 +23.689 -09.394 031.916 +0.000 0000 0 +24.813 -07.462 +22.566 -11.326 +23.689 -07.662 +23.689 -11.126
06=DSO 02 +13.886 -76.568 324.742 +0.000 0000 0 +16.261 -71.600 +11.512 -82.130 +13.886 -71.206 +13.886 -81.930
07=HS_ 01 -10.856 +80.764 122.740 +0.000 0000 0 -09.853 +83.451 -11.859 +78.770 -10.856 +82.604 -10.856 +78.924
08=AX_ 02 -22.952 +34.541 075.851 +0.000 0000 0 -22.190 +34.985 -23.714 +34.970 -22.952 +34.490 -22.952 +35.340
09=HS_ 04 -22.403 -57.759 343.551 +0.000 0000 0 -19.920 -54.944 -24.886 -60.575 -22.403 -55.444 -22.403 -60.740
20230804.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 →

2023/20230804_op · OP · 4 frames · 85.7 MB · 09:15:58–09:19:49 UT

09:17:12 UT · 30 ms 09:15:58 UT · 30 ms 09:19:08 UT · 50 ms · over-exposed 09:19:49 UT · 50 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.