Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Saturday, 18 February 2023

‹ 17.02.2023 2023 19.02.2023 ›

Photosphere sunspot drawing and RDS evaluation

18.02.2023 photosphere drawing

High-resolution scan (3230 px)

Time
10:20 UT
Observer
Ergün EGE
g
7
f
21
R
91
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · AX_ – 1Group 1 · AX_ – 1 Group 2 · ESI – 8Group 2 · ESI – 8 Group 3 · CSI – 5Group 3 · CSI – 5 Group 4 · BXO – 4Group 4 · BXO – 4 Group 5 · HS_ – 1Group 5 · HS_ – 1 Group 6 · HS_ – 1Group 6 · HS_ – 1 Group 7 · HR_ – 1Group 7 · HR_ – 1
RDS data file (.gzd) 
[Gözlem]
Tarih=18.02.2023
Saat=10:20
Gözlemci=Ergün EGE
KontrolEden=Olcay PLEVNE
Durumaçısı=-18.4
Enlemaçısı=-6.95
Boylamaçısı=87.28
Boylamfark=1
GKalite=3
GDurum=B.A , H.S
Kuzeyaçısı=-0.5
Sırano=19658
AyRasatNo=13
RasatÖnceki=17.02.2023
RasatSonraki=19.02.2023

[Leke Grupları]
Grupsayısı=7:3:4
LekeSayısı=21:14:7
RölatifSayı=91:44:47
01=AX_ 01 +23.242 +75.937 163.217 +0.000 0000 0 +23.561 +77.530 +22.924 +74.821 +23.242 +76.791 +23.242 +75.820
02=ESI 08 +09.519 +25.546 112.826 +0.000 0000 0 +11.541 +30.804 +07.498 +20.288 +09.519 +30.604 +09.519 +20.488
03=CSI 05 +24.558 -55.489 031.791 +0.000 0000 0 +27.354 -51.566 +21.762 -59.412 +24.558 -51.766 +24.558 -59.212
04=BXO 04 -21.180 +65.153 152.433 +0.000 0000 0 -19.760 +69.112 -22.599 +61.194 -21.180 +68.912 -21.180 +61.394
05=HS_ 01 -12.632 +50.932 138.212 +0.000 0000 0 -11.713 +51.923 -13.551 +49.942 -12.632 +51.423 -12.632 +50.441
06=HS_ 01 -14.225 +33.476 120.756 +0.000 0000 0 -13.123 +34.531 -15.326 +32.420 -14.225 +34.320 -14.225 +32.921
07=HR_ 01 -23.670 -81.618 005.662 +0.000 0000 0 -22.712 -80.752 -23.423 -82.483 -23.670 -81.252 -23.670 -81.983
20230218.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 →

2023/20230218_ee · EE · 8 frames · 171.4 MB · 10:27:25–10:42:32 UT

10:42:32 UT · 60 ms 10:40:56 UT · 40 ms 10:40:07 UT · 30 ms 10:41:30 UT · 50 ms 10:33:38 UT · 30 ms 10:32:34 UT · 40 ms 10:30:39 UT · 50 ms · over-exposed 10:27:25 UT · 60 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.