Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Wednesday, 17 June 2026

‹ 16.06.2026 2026 18.06.2026 ›

Photosphere sunspot drawing and RDS evaluation

17.06.2026 photosphere drawing

High-resolution scan (3230 px)

Time
07:30 UT
Observer
Yağız ALTIKULAÇ
g
5
f
15
R
65
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · CSO – 6Group 1 · CSO – 6 Group 2 · BXO – 3Group 2 · BXO – 3 Group 3 · HS_ – 2Group 3 · HS_ – 2 Group 4 · HS_ – 1Group 4 · HS_ – 1 Group 5 · AX_ – 3Group 5 · AX_ – 3
RDS data file (.gzd) 
[Gözlem]
Tarih=17.06.2026
Saat=07:30
Gözlemci=Yağız ALTIKULAÇ
KontrolEden=Emre YILMAN
Durumaçısı=-8.81
Enlemaçısı=1.26
Boylamaçısı=251.57
Boylamfark=2
GKalite=3
GDurum=K.T
Kuzeyaçısı=-0.4
Sırano=20488
AyRasatNo=12
RasatÖnceki=16.06.2026
RasatSonraki=18.06.2026

[Leke Grupları]
Grupsayısı=5:4:1
LekeSayısı=15:12:3
RölatifSayı=65:52:13
01=CSO 06 +05.832 +37.530 289.100 +0.000 0000 0 +07.752 +40.267 +03.911 +34.793 +05.832 +40.670 +05.832 +34.993
02=BXO 03 +18.126 -33.880 218.482 +0.000 0000 0 +19.174 -31.404 +17.790 -34.773 +18.126 -31.604 +18.126 -34.573
03=HS_ 02 +06.852 -59.636 191.934 -1.000 0000 0 +07.538 -58.524 +06.165 -60.748
04=HS_ 01 +07.655 -65.449 186.121 -1.000 0000 0 +08.559 -64.128 +06.750 -66.770
05=AX_ 03 -15.783 -03.294 248.276 -1.000 0000 0 -15.307 -02.760 -16.259 -04.512
20260617.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.