Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Saturday, 15 April 2023

‹ 14.04.2023 2023 17.04.2023 ›

Photosphere sunspot drawing and RDS evaluation

15.04.2023 photosphere drawing

High-resolution scan (3229 px)

Time
09:49 UT
Observer
Burçin TANIK
g
11
f
112
R
222
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · AX_ – 1Group 1 · AX_ – 1 Group 2 · AX_ – 1Group 2 · AX_ – 1 Group 3 · HS_ – 2Group 3 · HS_ – 2 Group 4 · BXI – 3Group 4 · BXI – 3 Group 5 · DKI – 24Group 5 · DKI – 24 Group 6 · CHI – 27Group 6 · CHI – 27 Group 7 · CSI – 16Group 7 · CSI – 16 Group 8 · AX_ – 1Group 8 · AX_ – 1 Group 9 · ESI – 17Group 9 · ESI – 17 Group 10 · EKI – 17Group 10 · EKI – 17 Group 11 · AX_ – 3Group 11 · AX_ – 3
RDS data file (.gzd) 
[Gözlem]
Tarih=15.04.2023
Saat=09:49
Gözlemci=Burçin TANIK
KontrolEden=Ergün EGE
Durumaçısı=-26.01
Enlemaçısı=-5.62
Boylamaçısı=69.3
Boylamfark=1
GKalite=3
GDurum=G.T
Kuzeyaçısı=-0.2
Sırano=19690
AyRasatNo=8
RasatÖnceki=14.04.2023
RasatSonraki=17.04.2023

[Leke Grupları]
Grupsayısı=11:5:6
LekeSayısı=112:31:81
RölatifSayı=222:81:141
01=AX_ 01 +08.634 +46.151 115.451 -1.000 0000 0 +08.634 +46.151 +08.634 +46.151
02=AX_ 01 +09.766 +24.775 094.750 -1.000 0000 0 +09.766 +24.775 +09.766 +24.775
03=HS_ 02 +18.811 -05.784 063.516 +0.000 0000 0 +19.304 -05.384 +18.319 -06.184 +18.811 -05.884 +18.811 -05.684
04=BXI 03 +36.865 -21.260 048.400 15.907 0000 0 +37.866 -19.384 +35.864 -23.136 +36.415 -20.300 +37.160 -22.620
05=DKI 24 +11.208 -47.229 022.710 07.234 0000 0 +12.805 -41.552 +09.612 -52.907 +10.390 -42.950 +11.425 -51.128
06=CHI 27 -08.707 +45.250 114.550 14.614 0000 0 -06.569 +51.303 -10.845 +39.197 -07.803 +50.357 -10.247 +40.938
07=CSI 16 -22.939 +29.455 098.755 15.937 0000 0 -19.317 +38.335 -26.561 +20.575 -20.334 +37.492 -24.783 +21.679
08=AX_ 01 -22.195 -16.681 052.619 -1.000 0000 0 -22.195 -16.681 -22.195 -16.681
09=ESI 17 -19.571 -32.755 036.545 00.419 0000 0 -17.838 -24.791 -21.304 -40.720 -20.624 -26.960 -20.727 -40.379
10=EKI 17 -23.613 -52.447 016.853 12.293 0000 0 -21.390 -46.960 -25.835 -58.797 -22.857 -47.818 -25.970 -58.159
11=AX_ 03 -26.605 -71.529 357.771 +0.000 0000 0 -26.109 -70.361 -27.101 -72.697 -26.605 -70.861 -26.605 -72.197
20230415.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 →

2023/20230415_bto · BTO · 8 frames · 171.4 MB · 09:57:43–10:54:29 UT

10:22:47 UT · 30 ms 10:20:30 UT · 30 ms 10:00:28 UT · 30 ms 09:57:43 UT · 70 ms 10:15:49 UT · 70 ms 10:50:40 UT · 70 ms · over-exposed 10:52:07 UT · 80 ms · over-exposed 10:54:29 UT · 100 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.