Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Tuesday, 2 May 2023

‹ 01.05.2023 2023 03.05.2023 ›

Photosphere sunspot drawing and RDS evaluation

02.05.2023 photosphere drawing

High-resolution scan (3230 px)

Time
07:45 UT
Observer
Korhan YELKENCİ
g
9
f
55
R
145
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · AX_ – 3Group 1 · AX_ – 3 Group 2 · BXI – 6Group 2 · BXI – 6 Group 3 · DAI – 18Group 3 · DAI – 18 Group 4 · FAI – 12Group 4 · FAI – 12 Group 5 · HS_ – 1Group 5 · HS_ – 1 Group 6 · AX_ – 2Group 6 · AX_ – 2 Group 7 · CAI – 6Group 7 · CAI – 6 Group 8 · DAI – 6Group 8 · DAI – 6 Group 9 · HS_ – 1Group 9 · HS_ – 1
RDS data file (.gzd) 
[Gözlem]
Tarih=2.05.2023
Saat=07:45
Gözlemci=Korhan YELKENCİ
KontrolEden=Olcay PLEVNE
Durumaçısı=-23.94
Enlemaçısı=-4.09
Boylamaçısı=205.86
Boylamfark=2
GKalite=3
GDurum=K.T
Kuzeyaçısı=-0.5
Sırano=19703
AyRasatNo=2
RasatÖnceki=01.05.2023
RasatSonraki=03.05.2023

[Leke Grupları]
Grupsayısı=9:5:4
LekeSayısı=55:40:15
RölatifSayı=145:90:55
01=AX_ 03 +06.249 +61.856 267.716 +0.000 0000 0 +06.667 +63.188 +05.831 +60.524 +06.249 +62.688 +06.249 +61.240
02=BXI 06 +15.651 +09.125 214.985 19.328 0000 0 +16.672 +11.668 +14.631 +06.582 +16.472 +11.468 +14.831 +06.782
03=DAI 18 +18.973 +03.540 209.400 43.815 0000 0 +21.655 +06.337 +16.290 +00.742 +21.455 +06.137 +16.490 +00.942
04=FAI 12 +12.299 -64.850 141.100 14.440 0000 0 +14.909 -54.905 +09.689 -74.794 +14.660 -55.105 +09.889 -74.594
05=HS_ 01 +08.370 -82.593 123.267 +0.000 0000 0 +09.427 -80.502 +06.647 -84.684 +08.370 -81.200 +08.370 -84.184
06=AX_ 02 -17.215 +66.270 272.130 +0.000 0000 0 -16.371 +67.370 -18.600 +65.169 +00.000 +00.000 +00.000 +00.000
07=CAI 06 -21.678 +63.108 268.968 18.988 0000 0 -20.311 +66.709 -23.450 +59.507 -20.511 +66.509 -22.845 +59.707
08=DAI 06 -24.985 +53.154 259.140 23.709 0000 0 -23.744 +55.707 -26.225 +50.601 -23.962 +55.507 -26.250 +50.801
09=HS_ 01 -07.312 -83.499 122.361 +0.000 0000 0 -06.300 -81.789 -08.621 -85.209 -07.312 -82.289 -07.312 -84.709
20230502.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 →

2023/20230502_ky · KY · 5 frames · 107.1 MB · 08:33:54–08:44:54 UT

08:36:16 UT · 25 ms 08:44:54 UT · 30 ms 08:33:54 UT · 30 ms 08:43:46 UT · 50 ms · over-exposed 08:40:51 UT · 60 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.