Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Saturday, 7 June 2025

‹ 06.06.2025 2025 09.06.2025 ›

Photosphere sunspot drawing and RDS evaluation

07.06.2025 photosphere drawing

High-resolution scan (3221 px)

Time
10:50 UT
Observer
Burçin TANIK
g
4
f
43
R
83
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · AX_ – 2Group 1 · AX_ – 2 Group 2 · CRO – 6Group 2 · CRO – 6 Group 3 · CAI – 31Group 3 · CAI – 31 Group 4 · BXO – 4Group 4 · BXO – 4
RDS data file (.gzd) 
[Gözlem]
Tarih=7.06.2025
Saat=10:50
Gözlemci=Burçin TANIK
KontrolEden=Korhan YELKENCİ
Durumaçısı=-12.84
Enlemaçısı=0.11
Boylamaçısı=159.64
Boylamfark=1
GKalite=3
GDurum=G.T
Kuzeyaçısı=0.0
Sırano=20264
AyRasatNo=7
RasatÖnceki=06.06.2025
RasatSonraki=09.06.2025

[Leke Grupları]
Grupsayısı=4:0:4
LekeSayısı=43:0:43
RölatifSayı=83:0:83
01=AX_ 02 -21.340 +08.173 167.813 +0.000 0000 0 -21.000 +09.374 -21.679 +06.972 -21.340 +08.874 -21.340 +07.472
02=CRO 06 -18.697 -06.580 153.600 +0.000 0000 0 -18.470 -03.968 -19.346 -09.192 -18.697 -04.468 -18.697 -08.692
03=CAI 31 -15.547 -30.495 129.145 24.870 0000 0 -12.184 -24.868 -18.911 -36.122 -13.852 -26.887 -17.740 -35.317
04=BXO 04 -16.760 -47.834 111.806 19.479 0000 0 -15.598 -45.793 -17.923 -49.876 -16.271 -46.309 -17.390 -49.476
20250607.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 →

2025/20250607_bto · BTO · 2 frames · 42.9 MB · 10:53:39–10:56:05 UT

10:56:05 UT · 30 ms 10:53:39 UT · 70 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.