Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Wednesday, 19 March 2025

‹ 17.03.2025 2025 21.03.2025 ›

Photosphere sunspot drawing and RDS evaluation

19.03.2025 photosphere drawing

High-resolution scan (3229 px)

Time
12:00 UT
Observer
Burçin TANIK
g
10
f
49
R
149
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · AX_ – 1Group 1 · AX_ – 1 Group 2 · CSO – 5Group 2 · CSO – 5 Group 3 · CAI – 10Group 3 · CAI – 10 Group 4 · DAO – 4Group 4 · DAO – 4 Group 5 · HS_ – 1Group 5 · HS_ – 1 Group 6 · BXI – 4Group 6 · BXI – 4 Group 7 · CSI – 15Group 7 · CSI – 15 Group 8 · HS_ – 1Group 8 · HS_ – 1 Group 9 · BXO – 4Group 9 · BXO – 4
RDS data file (.gzd) 
[Gözlem]
Tarih=19.03.2025
Saat=12:00
Gözlemci=Burçin TANIK
KontrolEden=Ergün EGE
Durumaçısı=-25.08
Enlemaçısı=-7.06
Boylamaçısı=136
Boylamfark=0
GKalite=3
GDurum=G.T , B.A
Kuzeyaçısı=-0.7
Sırano=20210
AyRasatNo=14
RasatÖnceki=17.03.2025
RasatSonraki=21.03.2025

[Leke Grupları]
Grupsayısı=10:4:6
LekeSayısı=49:20:29
RölatifSayı=149:60:89
01=AX_ 01 +04.570 +58.954 194.954 -1.000 0000 0 +04.570 +58.954 +04.570 +58.954
02=CSO 05 +09.822 +45.276 181.276 06.646 0000 0 +11.644 +49.319 +08.000 +41.233 +08.986 +48.629 +09.822 +41.433
03=CAI 10 +15.786 +29.240 165.240 13.854 0000 0 +17.530 +34.146 +14.410 +23.903 +14.737 +32.122 +16.351 +25.559
04=DAO 04 +14.594 -50.854 085.146 14.262 0000 0 +15.891 -46.867 +13.297 -54.841 +13.906 -48.400 +15.234 -53.234
05=HS_ 01 -05.345 +42.447 178.447 -1.000 0000 0 -04.364 +43.582 -06.327 +41.311
06=BXI 04 -20.453 +33.374 169.374 +0.000 0000 0 -19.961 +35.400 -20.944 +31.744 -20.453 +34.702 -20.453 +32.460
07=CSI 15 -16.968 +01.877 137.877 37.248 0000 0 -14.502 +04.786 -19.435 -01.330 -16.970 +03.525 -19.720 -00.393
08=HS_ 01 -17.242 -08.295 127.705 -1.000 0000 0 -15.964 -07.283 -18.519 -09.306
09=BXO 04 -14.680 -20.420 115.580 39.734 0000 0 -12.843 -17.916 -16.516 -22.923 -15.998 -18.913 -13.689 -21.693
10=AX_ 04 -10.149 -24.435 111.565 +0.000 0000 0 -08.910 -22.951 -11.387 -25.919 -10.149 -23.151 -10.149 -25.719
20250319.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 →

2025/20250319_bto · BTO · 3 frames · 64.3 MB · 12:12:43–12:16:09 UT

12:14:44 UT · 20 ms 12:16:09 UT · 40 ms · over-exposed 12:12:43 UT · 50 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.