Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Friday, 3 January 2025

‹ 02.01.2025 2025 05.01.2025 ›

Photosphere sunspot drawing and RDS evaluation

03.01.2025 photosphere drawing

High-resolution scan (3231 px)

Time
08:50 UT
Observer
Ergün EGE
g
13
f
65
R
195
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · AX_ – 1Group 1 · AX_ – 1 Group 2 · HS_ – 1Group 2 · HS_ – 1 Group 3 · AX_ – 2Group 3 · AX_ – 2 Group 4 · DAC – 9Group 4 · DAC – 9 Group 5 · HR_ – 1Group 5 · HR_ – 1 Group 6 · DSO – 2Group 6 · DSO – 2 Group 7 · CSO – 5Group 7 · CSO – 5 Group 8 · CSI – 4Group 8 · CSI – 4 Group 9 · BXO – 4Group 9 · BXO – 4 Group 10 · DAI – 7Group 10 · DAI – 7 Group 11 · DAI – 10Group 11 · DAI – 10 Group 12 · DSI – 17Group 12 · DSI – 17
RDS data file (.gzd) 
[Gözlem]
Tarih=3.01.2025
Saat=08:50
Gözlemci=Ergün EGE
KontrolEden=Süleyman FİŞEK
Durumaçısı=0.79
Enlemaçısı=-3.3
Boylamaçısı=45.51
Boylamfark=2
GKalite=3
GDurum=B.A
Kuzeyaçısı=-0.5
Sırano=20167
AyRasatNo=3
RasatÖnceki=02.01.2025
RasatSonraki=05.01.2025

[Leke Grupları]
Grupsayısı=13:4:9
LekeSayısı=65:13:52
RölatifSayı=195:53:142
01=AX_ 01 +13.333 +64.690 110.200 +0.000 0000 0 +13.657 +65.135 +13.100 +64.245 +13.333 +64.635 +13.333 +64.745
02=HS_ 01 +17.159 +55.538 101.480 -1.000 0000 0 +17.750 +56.346 +16.567 +54.730
03=AX_ 02 +14.207 -43.721 001.789 +0.000 0000 0 +14.668 -43.165 +13.747 -44.276 +14.207 -43.666 +14.207 -43.777
04=DAC 09 +11.635 -67.551 337.959 +0.000 0000 0 +13.250 -61.162 +10.190 -73.940 +11.635 -61.362 +11.635 -73.740
05=HR_ 01 -19.534 +81.937 127.447 -1.000 0000 0 -19.156 +85.395 -19.913 +78.478
06=DSO 02 -12.404 +58.320 103.542 +0.000 0000 0 -11.460 +61.841 -13.762 +54.224 -12.404 +61.641 -12.404 +54.424
07=CSO 05 -17.767 +36.387 081.897 +0.000 0000 0 -16.262 +38.468 -19.273 +34.307 -17.767 +38.268 -17.767 +34.507
08=CSI 04 -06.530 +30.740 075.584 +0.000 0000 0 -04.912 +36.752 -08.149 +23.395 -06.530 +36.552 -06.530 +23.595
09=BXO 04 -09.684 +13.173 058.683 +0.000 0000 0 -08.617 +14.952 -10.752 +11.393 -09.684 +14.752 -09.684 +11.593
10=DAI 07 -14.222 -01.964 043.546 +0.000 0000 0 -11.942 +02.213 -16.501 -06.142 -14.222 +02.130 -14.222 -05.942
11=DAI 10 -15.149 -33.458 012.520 +0.000 0000 0 -12.104 -28.553 -18.193 -38.362 -15.149 -28.753 -15.149 -38.162
12=DSI 17 -08.934 -41.354 004.156 25.872 0000 0 -06.185 -37.280 -11.683 -45.680 -07.724 -39.422 -10.203 -44.543
13=HS_ 02 -13.103 -48.230 357.280 -1.000 0000 0 -11.856 -46.895 -14.351 -49.565
20250103.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 →

2025/20250103_ee · EE · 8 frames · 171.4 MB · 08:55:42–09:11:46 UT

09:11:09 UT · 50 ms 09:09:29 UT · 30 ms 09:07:18 UT · 50 ms 09:10:33 UT · 40 ms 09:11:46 UT · 60 ms · over-exposed 09:08:24 UT · 60 ms · over-exposed 08:55:42 UT · 30 ms 08:57:24 UT · 40 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.