Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Solar Images Saturday, 27 May 2023

‹ 26.05.2023 2023 30.05.2023 ›

Photosphere sunspot drawing and RDS evaluation

27.05.2023 photosphere drawing

High-resolution scan (3229 px)

Time
09:00 UT
Observer
Ergün EGE
g
7
f
39
R
109
Seeing
3 / 5

Sunspot groups and observation details →

Sunspot groups (from the drawing)

Group 1 · HS_ – 3Group 1 · HS_ – 3 Group 2 · BXO – 4Group 2 · BXO – 4 Group 3 · HK_ – 3Group 3 · HK_ – 3 Group 4 · HS_ – 1Group 4 · HS_ – 1 Group 5 · BXO – 2Group 5 · BXO – 2 Group 6 · HS_ – 1Group 6 · HS_ – 1 Group 7 · DAI – 25Group 7 · DAI – 25
RDS data file (.gzd) 
[Gözlem]
Tarih=27.05.2023
Saat=09:00
Gözlemci=Ergün EGE
KontrolEden=Korhan YELKENCİ
Durumaçısı=-17.2
Enlemaçısı=-1.29
Boylamaçısı=234.56
Boylamfark=2
GKalite=3
GDurum=G.T , B.A
Kuzeyaçısı=-0.2
Sırano=19720
AyRasatNo=19
RasatÖnceki=26.05.2023
RasatSonraki=30.05.2023

[Leke Grupları]
Grupsayısı=7:5:2
LekeSayısı=39:13:26
RölatifSayı=109:63:46
01=HS_ 03 +15.434 +47.412 281.972 +0.000 0000 0 +16.460 +49.128 +14.407 +45.696 +15.434 +48.628 +15.434 +46.196
02=BXO 04 +17.180 +41.207 275.767 +0.000 0000 0 +17.681 +43.750 +16.356 +38.663 +17.180 +43.250 +17.180 +39.164
03=HK_ 03 +20.234 +30.570 264.617 +0.000 0000 0 +21.633 +31.584 +18.834 +28.530 +20.234 +31.597 +20.234 +29.543
04=HS_ 01 +22.134 +18.143 252.702 +0.000 0000 0 +23.366 +19.291 +20.901 +16.994 +22.134 +18.792 +22.134 +17.494
05=BXO 02 +08.162 -31.819 202.741 +0.000 0000 0 +09.123 -28.866 +07.201 -34.772 +08.162 -29.660 +08.162 -34.572
06=HS_ 01 -20.402 +48.720 282.632 +0.000 0000 0 -18.859 +50.322 -21.946 +45.822 -20.402 +50.470 -20.402 +46.970
07=DAI 25 -17.138 -02.287 232.273 +0.000 0000 0 -14.662 +03.288 -19.614 -07.863 -17.138 +03.880 -17.138 -07.663
20230527.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 →

2023/20230527_ee · EE · 10 frames · 214.3 MB · 09:06:00–09:23:55 UT

09:22:47 UT · 50 ms · over-exposed 09:22:11 UT · 40 ms 09:21:35 UT · 30 ms 09:09:42 UT · 60 ms · over-exposed 09:23:20 UT · 60 ms · over-exposed 09:06:00 UT · 30 ms · over-exposed 09:08:41 UT · 50 ms · over-exposed 09:06:58 UT · 40 ms · over-exposed 09:10:26 UT · 70 ms · over-exposed 09:23:55 UT · 70 ms · over-exposed

Coronado H-α animations from frame sequences

No Coronado observation for this day.