Images 16.08.2026 · Istanbul University Observatory Solar Observations

Solar Images Sunday, 16 August 2026

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Photosphere sunspot drawing and RDS evaluation

High-resolution scan (3231 px)

Time: 07:47 UT
Observer: Melike ERYILMAZ
g: 4
f: 26
R: 66
Seeing: 3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · AX_ – 1

Group 2 · DKI – 6

Group 3 · EHI – 17

Group 4 · HS_ – 2

RDS data file (.gzd)

[Gözlem]
Tarih=16.08.2026
Saat=07:47
Gözlemci=Melike ERYILMAZ
KontrolEden=Melike ERYILMAZ
Durumaçısı=16.4
Enlemaçısı=6.69
Boylamaçısı=177.59
Boylamfark=2
GKalite=3
GDurum=K.T
Kuzeyaçısı=-1.2
Sırano=20542
AyRasatNo=15
RasatÖnceki=15.08.2026
RasatSonraki=17.08.2026

[Leke Grupları]
Grupsayısı=4:4:0
LekeSayısı=26:26:0
RölatifSayı=66:66:0
01=AX_ 01 +11.549 +49.437 227.270 -1.000 0000 0 +11.549 +49.437 +11.549 +49.437
02=DKI 06 +10.435 +33.540 211.130 +0.000 0000 0 +12.346 +36.450 +08.524 +30.630 +10.435 +36.250 +10.435 +30.830
03=EHI 17 +03.843 +17.514 195.104 +0.000 0000 0 +06.165 +22.493 +01.521 +12.534 +03.843 +22.293 +03.843 +12.734
04=HS_ 02 +08.159 -12.150 165.440 +0.000 0000 0 +09.495 -11.231 +06.822 -13.690 +08.159 -11.420 +08.159 -12.879

20260816.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 →

2026/20260816_me · ME · 6 frames · 128.6 MB · 08:03:39–08:06:09 UT

08:05:39 UT · 60 ms · over-exposed

08:03:39 UT · 60 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.