Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Sunday, 29 June 2025

‹ 28.06.2025 2025 30.06.2025 ›

Photosphere sunspot drawing and RDS evaluation

29.06.2025 photosphere drawing

High-resolution scan (3230 px)

Time
09:20 UT
Observer
Korhan YELKENCİ
g
10
f
34
R
134
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · CAO – 2Group 1 · CAO – 2 Group 2 · BXI – 4Group 2 · BXI – 4 Group 3 · DAI – 12Group 3 · DAI – 12 Group 4 · HS_ – 1Group 4 · HS_ – 1 Group 5 · AX_ – 1Group 5 · AX_ – 1 Group 6 · HS_ – 1Group 6 · HS_ – 1 Group 7 · AX_ – 1Group 7 · AX_ – 1 Group 8 · HS_ – 1Group 8 · HS_ – 1 Group 9 · BXI – 8Group 9 · BXI – 8 Group 10 · BXI – 3Group 10 · BXI – 3
RDS data file (.gzd) 
[Gözlem]
Tarih=29.06.2025
Saat=09:20
Gözlemci=Korhan YELKENCİ
KontrolEden=Süleyman FİŞEK
Durumaçısı=-3.33
Enlemaçısı=2.68
Boylamaçısı=229.27
Boylamfark=1
GKalite=3
GDurum=K.T
Kuzeyaçısı=-0.5
Sırano=20285
AyRasatNo=28
RasatÖnceki=28.06.2025
RasatSonraki=30.06.2025

[Leke Grupları]
Grupsayısı=10:4:6
LekeSayısı=34:19:15
RölatifSayı=134:59:75
01=CAO 02 +06.100 +67.553 296.823 20.270 0000 0 +07.760 +69.918 +05.124 +65.188 +06.796 +69.378 +05.324 +65.388
02=BXI 04 +07.641 +30.998 260.268 +0.000 0000 0 +08.510 +32.847 +07.230 +29.150 +07.641 +32.347 +07.641 +29.649
03=DAI 12 +12.742 -12.696 216.574 23.514 0000 0 +15.860 -07.534 +10.398 -17.858 +14.886 -07.734 +10.598 -17.658
04=HS_ 01 +20.645 -55.623 173.647 +0.000 0000 0 +21.511 -54.598 +19.780 -56.649 +20.645 -55.970 +20.645 -56.149
05=AX_ 01 -11.696 +77.252 306.522 -1.000 0000 0 -11.696 +77.252 -11.696 +77.252
06=HS_ 01 -15.920 +74.101 303.371 +0.000 0000 0 -14.945 +75.853 -16.895 +72.348 -15.920 +75.354 -15.920 +72.848
07=AX_ 01 -10.217 +49.447 278.717 -1.000 0000 0 -10.217 +49.447 -10.217 +49.447
08=HS_ 01 -28.358 +02.642 231.912 +0.000 0000 0 -27.601 +03.364 -29.116 +01.920 -28.358 +02.864 -28.358 +02.420
09=BXI 08 -17.700 -43.762 185.508 21.201 0000 0 -16.592 -41.359 -18.807 -46.166 -16.900 -41.559 -18.607 -45.966
10=BXI 03 -04.778 -49.686 179.584 +0.000 0000 0 -04.287 -46.785 -05.270 -52.586 -04.778 -47.285 -04.778 -52.870
20250629.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.