Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Tuesday, 21 May 2024

‹ 20.05.2024 2024 22.05.2024 ›

Photosphere sunspot drawing and RDS evaluation

21.05.2024 photosphere drawing

High-resolution scan (3220 px)

Time
10:30 UT
Observer
Olcay PLEVNE
g
10
f
41
R
141
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · BXI – 2Group 1 · BXI – 2 Group 2 · HS_ – 1Group 2 · HS_ – 1 Group 3 · HA_ – 5Group 3 · HA_ – 5 Group 4 · CAI – 10Group 4 · CAI – 10 Group 5 · CAI – 8Group 5 · CAI – 8 Group 6 · BXI – 8Group 6 · BXI – 8 Group 7 · DSI – 2Group 7 · DSI – 2 Group 8 · BXI – 3Group 8 · BXI – 3 Group 9 · BXI – 1Group 9 · BXI – 1 Group 10 · AX_ – 1Group 10 · AX_ – 1
RDS data file (.gzd) 
[Gözlem]
Tarih=21.05.2024
Saat=10:30
Gözlemci=Olcay PLEVNE
KontrolEden=Burçin TANIK
Durumaçısı=-18.92
Enlemaçısı=-1.9
Boylamaçısı=162.33
Boylamfark=1
GKalite=3
GDurum=K.T
Kuzeyaçısı=0.0
Sırano=19983
AyRasatNo=14
RasatÖnceki=20.05.2024
RasatSonraki=22.05.2024

[Leke Grupları]
Grupsayısı=10:0:10
LekeSayısı=41:0:41
RölatifSayı=141:0:141
01=BXI 02 -21.952 +71.285 233.615 +0.000 0000 0 -20.143 +75.409 -23.760 +67.160 -21.952 +75.209 -21.952 +67.360
02=HS_ 01 -15.169 +57.539 219.869 +0.000 0000 0 -13.872 +59.889 -16.466 +55.189 -15.169 +59.389 -15.169 +55.689
03=HA_ 05 -07.992 +40.296 202.626 +0.000 0000 0 -06.592 +42.422 -09.392 +38.170 -07.992 +41.922 -07.992 +38.670
04=CAI 10 -10.240 +32.959 195.289 +0.000 0000 0 -08.140 +36.253 -12.465 +29.666 -10.240 +36.530 -10.240 +29.866
05=CAI 08 -06.529 +09.513 171.843 +0.000 0000 0 -05.420 +13.788 -08.160 +05.239 -06.529 +13.588 -06.529 +05.439
06=BXI 08 -10.850 -11.271 151.590 +0.000 0000 0 -09.548 -08.626 -12.153 -13.916 -10.850 -08.826 -10.850 -13.716
07=DSI 02 -14.413 -13.256 149.740 +0.000 0000 0 -12.406 -07.939 -16.420 -18.574 -14.413 -08.139 -14.413 -18.374
08=BXI 03 -07.534 -21.942 140.388 +0.000 0000 0 -06.479 -20.273 -08.589 -23.612 -07.534 -20.473 -07.534 -23.412
09=BXI 01 -12.344 -38.229 124.101 +0.000 0000 0 -11.810 -36.570 -13.607 -39.888 -12.344 -36.770 -12.344 -39.688
10=AX_ 01 -08.856 -65.516 096.814 -1.000 0000 0 -08.856 -65.516 -08.856 -65.516
20240521.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 →

2024/20240521_op · OP · 4 frames · 85.7 MB · 10:31:11–10:36:17 UT

10:32:47 UT · 40 ms · over-exposed 10:36:17 UT · 50 ms · over-exposed 10:34:41 UT · 50 ms · over-exposed 10:31:11 UT · 40 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.