Images 28.02.2024 · Istanbul University Observatory Solar Observations

Solar Images Wednesday, 28 February 2024

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Photosphere sunspot drawing and RDS evaluation

High-resolution scan (3216 px)

Time: 09:25 UT
Observer: Olcay PLEVNE
g: 5
f: 49
R: 99
Seeing: 3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · FKC – 29

Group 2 · HS_ – 1

Group 3 · DAI – 14

Group 4 · BXI – 4

Group 5 · HS_ – 1

RDS data file (.gzd)

[Gözlem]
Tarih=28.02.2024
Saat=09:25
Gözlemci=Olcay PLEVNE
KontrolEden=Korhan YELKENCİ
Durumaçısı=-21.21
Enlemaçısı=-7.2
Boylamaçısı=178.52
Boylamfark=1
GKalite=3
GDurum=K.T
Kuzeyaçısı=0.0
Sırano=19925
AyRasatNo=17
RasatÖnceki=27.02.2024
RasatSonraki=29.02.2024

[Leke Grupları]
Grupsayısı=5:4:1
LekeSayısı=49:48:1
RölatifSayı=99:88:11
01=FKC 29 +17.251 +42.222 220.742 +0.000 0000 0 +20.778 +52.980 +13.725 +32.346 +17.251 +51.898 +17.251 +32.546
02=HS_ 01 +03.940 -10.498 168.220 +0.000 0000 0 +04.938 -09.788 +02.943 -11.209 +03.940 -10.288 +03.940 -10.708
03=DAI 14 +19.312 -13.963 164.557 +0.000 0000 0 +21.500 -08.479 +17.618 -19.447 +19.312 -08.679 +19.312 -19.247
04=BXI 04 +16.997 -45.871 132.649 +0.000 0000 0 +19.408 -43.171 +14.586 -48.571 +16.997 -43.371 +16.997 -48.371
05=HS_ 01 -36.870 -19.680 158.840 +0.000 0000 0 -34.793 -18.579 -37.380 -20.780 -36.870 -19.800 -36.870 -20.281

20240228.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 →

2024/20240227_ky · KY · 1 frames · 21.4 MB · 09:24:27 UT

2024/20240228_op · OP · 5 frames · 107.1 MB · 09:24:27–09:31:07 UT

Coronado H-α animations from frame sequences

No Coronado observation for this day.