Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Sunday, 23 February 2025

‹ 21.02.2025 2025 24.02.2025 ›

Photosphere sunspot drawing and RDS evaluation

23.02.2025 photosphere drawing

High-resolution scan (3230 px)

Time
07:00 UT
Observer
Korhan YELKENCİ
g
11
f
76
R
186
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · HS_ – 2Group 1 · HS_ – 2 Group 2 · CSI – 6Group 2 · CSI – 6 Group 3 · HA_ – 3Group 3 · HA_ – 3 Group 4 · BXI – 7Group 4 · BXI – 7 Group 5 · BXI – 5Group 5 · BXI – 5 Group 6 · DAI – 5Group 6 · DAI – 5 Group 7 · HS_ – 1Group 7 · HS_ – 1 Group 8 · FSO – 8Group 8 · FSO – 8 Group 9 · DAC – 34Group 9 · DAC – 34 Group 10 · BXO – 2Group 10 · BXO – 2
RDS data file (.gzd) 
[Gözlem]
Tarih=23.02.2025
Saat=07:00
Gözlemci=Korhan YELKENCİ
KontrolEden=Korhan YELKENCİ
Durumaçısı=-20.02
Enlemaçısı=-7.11
Boylamaçısı=94.97
Boylamfark=3
GKalite=3
GDurum=B.A
Kuzeyaçısı=-0.4
Sırano=20193
AyRasatNo=8
RasatÖnceki=21.02.2025
RasatSonraki=24.02.2025

[Leke Grupları]
Grupsayısı=11:6:5
LekeSayısı=76:28:48
RölatifSayı=186:88:98
01=HS_ 02 +15.158 +48.163 143.133 -1.000 0000 0 +16.106 +49.215 +14.210 +47.112
02=CSI 06 +15.345 +13.459 108.429 +0.000 0000 0 +16.664 +15.200 +14.260 +11.899 +15.345 +14.820 +15.345 +12.990
03=HA_ 03 +21.320 +07.183 102.153 -1.000 0000 0 +22.112 +07.952 +20.529 +06.413
04=BXI 07 +17.603 +06.574 101.544 33.286 0000 0 +19.340 +08.483 +16.172 +04.664 +16.799 +07.596 +18.223 +05.425
05=BXI 05 +13.658 -15.942 079.280 25.171 0000 0 +14.604 -14.152 +12.712 -17.731 +14.404 -14.352 +12.912 -17.531
06=DAI 05 +19.335 -72.315 022.655 19.425 0000 0 +21.404 -66.548 +17.266 -78.820 +21.175 -66.748 +17.466 -77.340
07=HS_ 01 -05.826 +78.259 173.229 -1.000 0000 0 -05.826 +78.259 -05.826 +78.259
08=FSO 08 -14.675 +31.970 126.940 10.697 0000 0 -11.986 +40.517 -17.364 +23.423 -14.416 +37.288 -16.703 +25.810
09=DAC 34 -12.629 +17.286 112.256 32.243 0000 0 -09.421 +22.296 -15.838 +12.277 -09.621 +22.960 -15.638 +12.477
10=BXO 02 -05.295 -50.680 044.902 +0.000 0000 0 -04.817 -48.395 -05.772 -51.741 -05.295 -49.507 -05.295 -51.853
11=BXI 03 -11.420 -67.176 027.794 49.655 0000 0 -09.547 -65.553 -13.294 -68.799 -09.748 -65.753 -13.940 -68.599
20250223.gzd

Chromosphere (H-α) FITS frames

No chromosphere observation for this day.

Coronado H-α animations from frame sequences

No Coronado observation for this day.