Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Friday, 28 April 2023

‹ 26.04.2023 2023 30.04.2023 ›

Photosphere sunspot drawing and RDS evaluation

28.04.2023 photosphere drawing

High-resolution scan (3233 px)

Time
08:20 UT
Observer
Hikmet ÇAKMAK
g
7
f
38
R
108
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · AX_ – 1Group 1 · AX_ – 1 Group 2 · BXO – 7Group 2 · BXO – 7 Group 3 · HA_ – 5Group 3 · HA_ – 5 Group 4 · AX_ – 1Group 4 · AX_ – 1 Group 5 · HA_ – 6Group 5 · HA_ – 6 Group 6 · FAI – 16Group 6 · FAI – 16 Group 7 · AX_ – 2Group 7 · AX_ – 2
RDS data file (.gzd) 
[Gözlem]
Tarih=28.04.2023
Saat=08:20
Gözlemci=Hikmet ÇAKMAK
KontrolEden=Hikmet ÇAKMAK
Durumaçısı=-24.61
Enlemaçısı=-4.48
Boylamaçısı=258.4
Boylamfark=2
GKalite=3
GDurum=G.T , B.A , H.S
Kuzeyaçısı=-0.4
Sırano=19700
AyRasatNo=18
RasatÖnceki=26.04.2023
RasatSonraki=30.04.2023

[Leke Grupları]
Grupsayısı=7:4:3
LekeSayısı=38:14:24
RölatifSayı=108:54:54
01=AX_ 01 +17.767 +18.340 276.740 -1.000 0000 0 +17.767 +18.340 +17.767 +18.340
02=BXO 07 +07.867 +04.534 262.934 33.990 0000 0 +09.680 +07.179 +06.540 +01.889 +06.676 +06.441 +09.319 +02.379
03=HA_ 05 +19.415 -46.714 211.686 +0.000 0000 0 +21.548 -45.698 +17.281 -47.731 +19.415 -46.198 +19.415 -47.230
04=AX_ 01 +14.321 -52.514 205.886 -1.000 0000 0 +14.321 -52.514 +14.321 -52.514
05=HA_ 06 -17.135 +13.486 271.886 +0.000 0000 0 -15.582 +15.668 -18.688 +11.304 -17.135 +15.168 -17.135 +11.804
06=FAI 16 -21.704 +06.292 264.692 16.914 0000 0 -18.780 +12.401 -24.629 +00.183 -21.140 +11.356 -24.288 +00.933
07=AX_ 02 -12.460 +01.961 260.361 +0.000 0000 0 -11.211 +02.412 -13.709 +01.509 -12.460 +01.912 -12.460 +02.100
20230428.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 →

2023/20230428_hc · HC · 7 frames · 150.0 MB · 08:24:51–09:02:56 UT

08:24:51 UT · 30 ms 08:35:01 UT · 40 ms 08:38:09 UT · 40 ms 09:01:37 UT · 40 ms 09:02:56 UT · 60 ms · over-exposed 08:36:58 UT · 60 ms · over-exposed 08:36:11 UT · 70 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.