Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Tuesday, 7 January 2025

‹ 06.01.2025 2025 08.01.2025 ›

Photosphere sunspot drawing and RDS evaluation

07.01.2025 photosphere drawing

High-resolution scan (3226 px)

Time
09:25 UT
Observer
Olcay PLEVNE
g
10
f
65
R
165
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · CSI – 3Group 1 · CSI – 3 Group 2 · AX_ – 2Group 2 · AX_ – 2 Group 3 · EKC – 24Group 3 · EKC – 24 Group 4 · BXI – 5Group 4 · BXI – 5 Group 5 · BXI – 4Group 5 · BXI – 4 Group 6 · HS_ – 1Group 6 · HS_ – 1 Group 7 · CAI – 20Group 7 · CAI – 20 Group 8 · HS_ – 3Group 8 · HS_ – 3 Group 9 · AX_ – 1Group 9 · AX_ – 1
RDS data file (.gzd) 
[Gözlem]
Tarih=7.01.2025
Saat=09:25
Gözlemci=Olcay PLEVNE
KontrolEden=Burçin TANIK
Durumaçısı=-1.15
Enlemaçısı=-3.75
Boylamaçısı=352.51
Boylamfark=1
GKalite=3
GDurum=H.S
Kuzeyaçısı=0.0
Sırano=20170
AyRasatNo=6
RasatÖnceki=06.01.2025
RasatSonraki=08.01.2025

[Leke Grupları]
Grupsayısı=10:3:7
LekeSayısı=65:29:36
RölatifSayı=165:59:106
01=CSI 03 +13.663 +11.946 004.456 +0.000 0000 0 +14.667 +15.526 +12.658 +08.366 +13.663 +15.326 +13.663 +08.566
02=AX_ 02 +16.854 -05.997 346.513 +0.000 0000 0 +17.741 -04.943 +15.967 -07.500 +00.000 +00.000 +00.000 +00.000
03=EKC 24 +11.564 -13.841 338.669 +0.000 0000 0 +13.851 -07.140 +09.276 -20.541 +11.564 -07.340 +11.564 -20.341
04=BXI 05 -14.990 +49.956 042.466 +0.000 0000 0 -13.425 +53.909 -16.555 +46.300 -14.990 +53.709 -14.990 +46.203
05=BXI 04 -09.552 +33.461 025.971 +0.000 0000 0 -08.388 +36.980 -10.716 +29.942 -09.552 +36.780 -09.552 +30.142
06=HS_ 01 -16.858 +22.504 015.140 -1.000 0000 0 -16.170 +23.268 -17.700 +21.740
07=CAI 20 -09.714 +10.824 003.334 10.584 0000 0 -07.564 +14.575 -11.864 +07.740 -09.701 +12.607 -10.545 +08.880
08=HS_ 03 -12.838 +03.700 356.211 -1.000 0000 0 -10.869 +04.767 -14.807 +02.634
09=AX_ 01 -16.231 -26.113 326.397 -1.000 0000 0 -16.231 -26.113 -16.231 -26.113
10=HS_ 02 -18.249 -33.216 319.294 -1.000 0000 0 -17.112 -31.426 -19.386 -35.500
20250107.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 →

2025/20250107_op · OP · 4 frames · 85.7 MB · 09:24:43–09:28:40 UT

09:24:43 UT · 30 ms 09:26:21 UT · 30 ms 09:27:57 UT · 50 ms 09:28:40 UT · 50 ms

Coronado H-α animations from frame sequences

No Coronado observation for this day.