Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Sunday, 19 February 2023

‹ 18.02.2023 2023 20.02.2023 ›

Photosphere sunspot drawing and RDS evaluation

19.02.2023 photosphere drawing

High-resolution scan (3230 px)

Time
08:00 UT
Observer
O.PLEVNE=B.T.
g
7
f
33
R
103
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · EKO – 13Group 1 · EKO – 13 Group 2 · AX_ – 2Group 2 · AX_ – 2 Group 3 · EKI – 7Group 3 · EKI – 7 Group 4 · EAO – 5Group 4 · EAO – 5 Group 5 · HS_ – 2Group 5 · HS_ – 2 Group 6 · HS_ – 2Group 6 · HS_ – 2 Group 7 · HS_ – 2Group 7 · HS_ – 2
RDS data file (.gzd) 
[Gözlem]
Tarih=19.02.2023
Saat=08:00
Gözlemci=O.PLEVNE=B.T.
KontrolEden=Ergün EGE
Durumaçısı=-18.68
Enlemaçısı=-6.98
Boylamaçısı=75.39
Boylamfark=2
GKalite=3
GDurum=H.S , K.T
Kuzeyaçısı=0.0
Sırano=19659
AyRasatNo=14
RasatÖnceki=18.02.2023
RasatSonraki=20.02.2023

[Leke Grupları]
Grupsayısı=7:3:4
LekeSayısı=33:22:11
RölatifSayı=103:52:51
01=EKO 13 +09.944 +35.867 111.257 +0.000 0000 0 +11.860 +41.304 +08.270 +30.431 +09.944 +41.104 +09.944 +30.631
02=AX_ 02 +19.517 +28.728 104.118 +0.000 0000 0 +20.170 +29.512 +19.170 +27.943 +19.517 +29.130 +19.517 +28.444
03=EKI 07 +25.161 -44.306 031.840 +0.000 0000 0 +27.959 -38.577 +22.362 -50.340 +25.161 -38.777 +25.161 -49.834
04=EAO 05 -21.641 +74.462 149.852 +0.000 0000 0 -20.254 +80.652 -23.290 +68.272 -21.641 +80.452 -21.641 +68.472
05=HS_ 02 -13.135 +60.441 135.831 +0.000 0000 0 -11.727 +61.936 -14.543 +58.945 -13.135 +61.437 -13.135 +59.446
06=HS_ 02 -14.273 +43.719 119.109 +0.000 0000 0 -12.963 +44.928 -15.583 +42.509 -14.273 +44.429 -14.273 +43.100
07=HS_ 02 -22.349 -69.382 006.800 +0.000 0000 0 -20.854 -66.839 -23.845 -71.925 -22.349 -67.339 -22.349 -71.425
20230219.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 →

2023/20230219_op · OP · 4 frames · 85.7 MB · 08:22:30–08:24:55 UT

08:22:30 UT · 40 ms 08:23:30 UT · 40 ms 08:24:55 UT · 70 ms · over-exposed 08:24:16 UT · 70 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.