Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Tuesday, 11 March 2025

‹ 10.03.2025 2025 12.03.2025 ›

Photosphere sunspot drawing and RDS evaluation

11.03.2025 photosphere drawing

High-resolution scan (3227 px)

Time
08:45 UT
Observer
B.TANIK=O.P.
g
9
f
63
R
153
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · AX_ – 4Group 1 · AX_ – 4 Group 2 · DAC – 17Group 2 · DAC – 17 Group 3 · HS_ – 1Group 3 · HS_ – 1 Group 4 · BXI – 7Group 4 · BXI – 7 Group 5 · AX_ – 3Group 5 · AX_ – 3 Group 6 · HS_ – 1Group 6 · HS_ – 1 Group 7 · CRI – 8Group 7 · CRI – 8 Group 8 · CKI – 14Group 8 · CKI – 14 Group 9 · CSO – 8Group 9 · CSO – 8
RDS data file (.gzd) 
[Gözlem]
Tarih=11.03.2025
Saat=08:45
Gözlemci=B.TANIK=O.P.
KontrolEden=Süleyman FİŞEK
Durumaçısı=-23.81
Enlemaçısı=-7.22
Boylamaçısı=243.23
Boylamfark=2
GKalite=3
GDurum=G.T
Kuzeyaçısı=-0.7
Sırano=20205
AyRasatNo=9
RasatÖnceki=10.03.2025
RasatSonraki=12.03.2025

[Leke Grupları]
Grupsayısı=9:6:3
LekeSayısı=63:33:30
RölatifSayı=153:93:60
01=AX_ 04 +05.411 +43.362 286.592 +0.000 0000 0 +06.164 +44.575 +04.658 +42.150 +05.411 +44.750 +05.411 +42.649
02=DAC 17 +05.700 -28.489 214.741 13.843 0000 0 +06.638 -24.626 +03.376 -32.352 +05.866 -25.253 +04.363 -31.367
03=HS_ 01 +18.368 -46.309 196.921 +0.000 0000 0 +19.980 -45.331 +17.639 -47.287 +18.368 -45.831 +18.368 -46.787
04=BXI 07 +06.792 -55.206 188.240 51.222 0000 0 +09.316 -53.218 +04.267 -57.194 +05.450 -54.416 +08.654 -56.994
05=AX_ 03 +09.907 -66.171 177.590 +0.000 0000 0 +10.724 -65.270 +09.910 -67.720 +00.000 +00.000 +00.000 +00.000
06=HS_ 01 +24.390 -67.580 175.650 +0.000 0000 0 +24.850 -66.278 +23.228 -68.883 +24.390 -66.778 +24.390 -68.382
07=CRI 08 -13.742 +60.211 303.441 55.432 0000 0 -11.998 +62.300 -15.486 +58.123 -12.914 +59.759 -14.877 +61.112
08=CKI 14 -20.750 -13.520 229.710 12.447 0000 0 -18.965 -08.283 -22.534 -18.756 -20.249 -09.240 -22.360 -17.367
09=CSO 08 -07.660 -64.958 178.272 43.456 0000 0 -04.968 -62.339 -09.164 -67.576 -06.850 -64.473 -08.333 -66.848
20250311.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 →

2025/20250311_bto · BTO · 4 frames · 85.7 MB · 08:53:33–08:58:23 UT

08:56:27 UT · 20 ms 08:53:33 UT · 30 ms 08:55:06 UT · 60 ms · over-exposed 08:58:23 UT · 60 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.