Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Wednesday, 8 January 2025

‹ 07.01.2025 2025 09.01.2025 ›

Photosphere sunspot drawing and RDS evaluation

08.01.2025 photosphere drawing

High-resolution scan (3236 px)

Time
12:20 UT
Observer
Burçin TANIK
g
9
f
54
R
144
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · AX_ – 1Group 1 · AX_ – 1 Group 2 · AX_ – 1Group 2 · AX_ – 1 Group 3 · BXI – 7Group 3 · BXI – 7 Group 4 · EKI – 29Group 4 · EKI – 29 Group 5 · AX_ – 1Group 5 · AX_ – 1 Group 6 · HR_ – 2Group 6 · HR_ – 2 Group 7 · AX_ – 7Group 7 · AX_ – 7 Group 8 · AX_ – 2Group 8 · AX_ – 2
RDS data file (.gzd) 
[Gözlem]
Tarih=8.01.2025
Saat=12:20
Gözlemci=Burçin TANIK
KontrolEden=Korhan YELKENCİ
Durumaçısı=-1.69
Enlemaçısı=-3.87
Boylamaçısı=337.74
Boylamfark=0
GKalite=3
GDurum=G.T
Kuzeyaçısı=-0.7
Sırano=20171
AyRasatNo=7
RasatÖnceki=07.01.2025
RasatSonraki=09.01.2025

[Leke Grupları]
Grupsayısı=9:4:5
LekeSayısı=54:38:16
RölatifSayı=144:78:66
01=AX_ 01 +18.226 +48.238 025.978 -1.000 0000 0 +18.226 +48.238 +18.226 +48.238
02=AX_ 01 +13.115 +31.363 009.103 -1.000 0000 0 +13.115 +31.363 +13.115 +31.363
03=BXI 07 +19.434 +09.629 347.369 +0.000 0000 0 +20.815 +11.873 +18.530 +07.385 +19.434 +11.673 +19.434 +07.585
04=EKI 29 +10.749 +01.375 339.115 11.571 0000 0 +13.240 +08.251 +08.258 -05.501 +10.290 +06.623 +12.203 -04.650
05=AX_ 01 -15.270 +63.283 041.230 -1.000 0000 0 -15.270 +63.283 -15.270 +63.283
06=HR_ 02 -16.241 +38.497 016.237 -1.000 0000 0 -15.593 +39.125 -16.889 +37.870
07=AX_ 07 -09.709 +28.733 006.473 +0.000 0000 0 -08.940 +30.510 -11.324 +27.414 +00.000 +00.000 +00.000 +00.000
08=AX_ 02 -11.399 +24.523 002.263 -1.000 0000 0 -11.399 +24.523 -11.399 +24.523
09=CSI 04 -17.695 -19.719 318.210 11.340 0000 0 -16.467 -15.622 -18.923 -23.817 -18.277 -16.782 -17.630 -22.846
20250108.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 →

2025/20250108_bto · BTO · 2 frames · 42.9 MB · 12:34:04–12:35:41 UT

12:35:41 UT · 30 ms 12:34:04 UT · 70 ms

Coronado H-α animations from frame sequences

No Coronado observation for this day.