Images 25.10.2021 · Istanbul University Observatory Solar Observations

Solar Images Monday, 25 October 2021

‹ 23.10.2021 2021 26.10.2021 ›

Photosphere sunspot drawing and RDS evaluation

High-resolution scan (3232 px)

Time: 07:45 UT
Observer: Hikmet ÇAKMAK
g: 5
f: 24
R: 74
Seeing: 3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · HS_ – 1

Group 2 · HA_ – 5

Group 3 · CAI – 13

Group 4 · AX_ – 1

Group 5 · ?__ – 4

RDS data file (.gzd)

[Gözlem]
Tarih=25.10.2021
Saat=07:45
Gözlemci=Hikmet ÇAKMAK
KontrolEden=Korhan YELKENCİ
Durumaçısı=25.4
Enlemaçısı=5.03
Boylamaçısı=314.5
Boylamfark=2
GKalite=3
GDurum=G.T , H.S
Kuzeyaçısı=-0.4
Sırano=19306
AyRasatNo=17
RasatÖnceki=23.10.2021
RasatSonraki=26.10.2021

[Leke Grupları]
Grupsayısı=5:0:5
LekeSayısı=24:0:24
RölatifSayı=74:0:74
01=HS_ 01 -18.920 +16.733 331.233 +0.000 0000 0 -17.440 +17.821 -19.141 +15.644 -18.920 +17.321 -18.920 +16.145
02=HA_ 05 -22.329 -37.400 277.460 +0.000 0000 0 -20.921 -35.231 -23.737 -38.849 -22.329 -36.910 -22.329 -38.709
03=CAI 13 -26.644 -39.370 275.130 24.917 0000 0 -24.325 -35.436 -28.962 -43.305 -27.996 -37.332 -25.741 -42.196
04=AX_ 01 -13.800 -63.108 251.392 -1.000 0000 0 -13.800 -63.108 -13.800 -63.108
05=?__ 04 -22.809 -67.744 246.756 +0.000 0000 0 -21.389 -64.355 -24.229 -71.134 -22.809 -64.854 -22.809 -70.634

20211025.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 →

2021/20211025_hc · HC · 3 frames · 64.3 MB · 07:36:07–07:41:58 UT

07:41:58 UT · 40 ms

07:38:37 UT · 80 ms · over-exposed

07:36:07 UT · 80 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.