Images 29.05.2025 · Istanbul University Observatory Solar Observations

Solar Images Thursday, 29 May 2025

‹ 28.05.2025 2025 01.06.2025 ›

Photosphere sunspot drawing and RDS evaluation

High-resolution scan (3233 px)

Time: 07:00 UT
Observer: Burçin TANIK
g: 6
f: 53
R: 113
Seeing: 3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · HS_ – 1

Group 2 · BXO – 4

Group 3 · HK_ – 16

Group 4 · HR_ – 4

Group 5 · CSO – 2

RDS data file (.gzd)

[Gözlem]
Tarih=29.05.2025
Saat=07:00
Gözlemci=Burçin TANIK
KontrolEden=Burçin TANIK
Durumaçısı=-16.34
Enlemaçısı=-1
Boylamaçısı=280.86
Boylamfark=3
GKalite=3
GDurum=G.T , K.T
Kuzeyaçısı=-0.2
Sırano=20257
AyRasatNo=23
RasatÖnceki=28.05.2025
RasatSonraki=01.06.2025

[Leke Grupları]
Grupsayısı=6:4:2
LekeSayısı=53:25:28
RölatifSayı=113:65:48
01=HS_ 01 +06.621 +24.667 305.527 -1.000 0000 0 +07.626 +25.368 +05.615 +23.965
02=BXO 04 +02.601 -22.323 258.537 +0.000 0000 0 +03.173 -19.636 +02.290 -25.110 +02.601 -20.860 +02.601 -24.560
03=HK_ 16 +08.203 -35.534 245.326 -1.000 0000 0 +11.950 -32.109 +05.312 -38.960
04=HR_ 04 +09.286 -41.739 239.121 -1.000 0000 0 +10.281 -40.966 +08.290 -42.512
05=CSO 02 -12.755 +55.528 336.388 +0.000 0000 0 -11.812 +58.360 -13.697 +53.200 -12.755 +57.836 -12.755 +53.220
06=HK_ 26 -14.600 -25.210 255.650 -1.000 0000 0 -12.310 -22.430 -15.982 -28.377

20250529.gzd

Chromosphere (H-α) FITS frames

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 →

2025/20250529_bto · BTO · 4 frames · 85.7 MB · 07:08:30–07:12:42 UT

07:11:24 UT · 40 ms

07:10:04 UT · 20 ms

07:08:30 UT · 60 ms · over-exposed

07:12:42 UT · 70 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.