Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Sunday, 2 April 2023

‹ 30.03.2023 2023 03.04.2023 ›

Photosphere sunspot drawing and RDS evaluation

02.04.2023 photosphere drawing

High-resolution scan (3233 px)

Time
09:05 UT
Observer
Hikmet ÇAKMAK
g
3
f
4
R
34
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · HA_ – 1Group 1 · HA_ – 1 Group 2 · HA_ – 2Group 2 · HA_ – 2 Group 3 · AX_ – 1Group 3 · AX_ – 1
RDS data file (.gzd) 
[Gözlem]
Tarih=2.04.2023
Saat=09:05
Gözlemci=Hikmet ÇAKMAK
KontrolEden=Ergün EGE
Durumaçısı=-26.18
Enlemaçısı=-6.5
Boylamaçısı=241.28
Boylamfark=2
GKalite=3
GDurum=G.T , B.A , H.S
Kuzeyaçısı=-0.4
Sırano=19683
AyRasatNo=1
RasatÖnceki=30.03.2023
RasatSonraki=03.04.2023

[Leke Grupları]
Grupsayısı=3:1:2
LekeSayısı=4:1:3
RölatifSayı=34:11:23
01=HA_ 01 +14.790 +36.432 277.712 +0.000 0000 0 +15.355 +36.976 +14.226 +35.888 +14.790 +36.476 +14.790 +36.388
02=HA_ 02 -18.703 +62.836 304.116 +0.000 0000 0 -18.113 +63.858 -19.294 +61.813 -18.703 +63.358 -18.703 +62.313
03=AX_ 01 -23.888 -52.898 188.382 -1.000 0000 0 -23.888 -52.898 -23.888 -52.898
20230402.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 →

2023/20230402_hc · HC · 5 frames · 107.1 MB · 09:06:02–09:16:03 UT

09:07:38 UT · 40 ms 09:16:03 UT · 40 ms 09:06:02 UT · 40 ms 09:14:50 UT · 80 ms · over-exposed 09:10:04 UT · 80 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.