Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Wednesday, 19 July 2023

‹ 18.07.2023 2023 20.07.2023 ›

Photosphere sunspot drawing and RDS evaluation

19.07.2023 photosphere drawing

High-resolution scan (3226 px)

Time
07:50 UT
Observer
Olcay PLEVNE
g
7
f
59
R
129
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · FHC – 10Group 1 · FHC – 10 Group 2 · EAI – 23Group 2 · EAI – 23 Group 3 · DSI – 9Group 3 · DSI – 9 Group 4 · CSI – 3Group 4 · CSI – 3 Group 5 · AX_ – 2Group 5 · AX_ – 2 Group 6 · CSI – 9Group 6 · CSI – 9 Group 7 · CSI – 3Group 7 · CSI – 3 Group 8Group 8
RDS data file (.gzd) 
[Gözlem]
Tarih=19.07.2023
Saat=07:50
Gözlemci=Olcay PLEVNE
KontrolEden=Burçin TANIK
Durumaçısı=5.38
Enlemaçısı=4.68
Boylamaçısı=253.74
Boylamfark=2
GKalite=3
GDurum=K.T
Kuzeyaçısı=0.0
Sırano=19767
AyRasatNo=18
RasatÖnceki=18.07.2023
RasatSonraki=20.07.2023

[Leke Grupları]
Grupsayısı=7:4:3
LekeSayısı=59:45:14
RölatifSayı=129:85:44
01=FHC 10 +22.692 +13.947 267.687 +0.000 0000 0 +25.907 +22.647 +19.477 +05.247 +22.692 +22.447 +22.692 +05.447
02=EAI 23 +06.347 -08.859 244.881 +0.000 0000 0 +10.210 -02.293 +02.674 -15.426 +06.347 -02.493 +06.347 -15.226
03=DSI 09 +24.202 -26.146 227.594 +0.000 0000 0 +27.462 -22.668 +20.942 -29.624 +24.202 -22.868 +24.202 -29.424
04=CSI 03 +15.417 -79.762 173.978 +0.000 0000 0 +19.320 -75.546 +11.515 -83.978 +15.417 -75.746 +15.417 -83.778
05=AX_ 02 -07.753 -11.490 242.250 -1.000 0000 0 -07.753 -11.490 -07.753 -11.490
06=CSI 09 -26.349 -23.743 229.997 +0.000 0000 0 -25.223 -20.407 -27.475 -27.790 -26.349 -20.607 -26.349 -26.879
07=CSI 03 -09.312 -58.358 195.382 +0.000 0000 0 -07.708 -53.975 -10.917 -62.740 -09.312 -54.175 -09.312 -62.540
20230719.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 →

2023/20230719_op · OP · 5 frames · 107.1 MB · 07:52:14–07:59:39 UT

07:52:14 UT · 40 ms 07:59:39 UT · 30 ms 07:53:50 UT · 40 ms 07:58:42 UT · 60 ms · over-exposed 07:57:41 UT · 60 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.