Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Monthly Sunspot Classification and Coordinates

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July 2023 Monthly report →

Each group: class – number of spots (B, ΔL). NS: No sunspot.

DrawingDayRClassification and Coordinates
01 138 DSC – 28 (17, 37.8W), DHC – 16 (15, 29.1W), AX_ – 2 (-15, 16.7E), AX_ – 6 (-6, 31E), CSI – 7 (-6, 40.4E), AX_ – 1 (-20, 66.4E), CSI – 8 (-13, 67.3E)
02 169 FKC – 52 (17, 46.9W), HS_ – 1 (23, 55.2E), AX_ – 5 (-16, 07E), CRI – 6 (-6, 19.4E), DSI – 10 (-6, 29E), DAI – 12 (-21, 50.4E), DAI – 13 (-14, 54.3E)
03 157 FKI – 21 (17, 58.7W), BXO – 2 (9, 33.6E), CAO – 4 (23, 42E), AX_ – 3 (-7, 04.1E), CAI – 11 (-6, 16E), DAI – 8 (-21, 36.3E), DAC – 26 (-14, 39.8E), AX_ – 2 (-7, 55.1E)
04 170 EKC – 13 (17, 71.9W), CAI – 10 (23, 29.7E), CSI – 5 (22, 56.5E), AX_ – 2 (-18, 19.3W), EAI – 17 (-6, 00.7W), DAI – 9 (-21, 23.3E), DSI – 22 (-14, 25.9E), AX_ – 1 (-8, 39.6E), HS_ – 1 (-9, 84.2E)
05 142 HS_ – 1 (15, 81.8W), BXI – 9 (24, 18.2E), CAI – 7 (23, 42.1E), BXI – 11 (-6, 10.8W), BXI – 14 (-13, 09.9E), CSI – 13 (-21, 11.1E), AX_ – 5 (-10, 24.5E), HS_ – 2 (-8, 72.4E)
06 141 CSI – 7 (24, 04.6E), ESC – 15 (24, 27.4E), AX_ – 4 (-15, 42.2W), AX_ – 5 (-6, 21.2W), AX_ – 1 (-13, 05.7W), DSI – 13 (-21, 00.9W), AX_ – 4 (-11, 02.8E), HS_ – 1 (-8, 58.2E), ?__ – 1 (-19, 81.4E)
07 163 HS_ – 2 (24, 10.8W), DSC – 16 (25, 12.3E), AX_ – 1 (25, 54.5E), DSI – 14 (-20, 15W), BXI – 7 (-11, 10.2W), BXO – 4 (-35, 09.2W), BXI – 14 (-9, 01W), AX_ – 1 (-18, 02.4E), HS_ – 2 (-8, 44.7E), HK_ – 2 (-20, 70.9E)
08 179 CRO – 3 (23, 22W), DAC – 19 (24, 00.9E), BXO – 3 (10, 26.7E), AX_ – 3 (25, 40.3E), AX_ – 1 (-13, 72.4W), DAC – 8 (-20, 27.9W), AX_ – 2 (-12, 25.1W), CRO – 3 (-35, 22.4W), DAI – 13 (-9, 13.5W), HS_ – 2 (-7, 31.2E), HH_ – 1 (-20, 54.2E), AX_ – 1 (-21, 68.5E)
10 156 BXO – 7 (22, 47.6W), DSI – 9 (24, 25.9W), CSI – 12 (10, 02.6W), AX_ – 1 (24, 11.9E), DSI – 7 (-10, 43.2W), CSI – 5 (-19, 37.1W), CSI – 5 (-19, 26.2W), HS_ – 2 (-8, 05.1E), HA_ – 3 (-21, 29.6E), BXO – 5 (-15, 74.7E)
11 232 BXI – 7 (23, 63.5W), EAC – 17 (25, 38.6W), DAI – 24 (11, 17.2W), AX_ – 1 (25, 02.6W), ?__ – 1 (22, 85.6E), CAI – 8 (-11, 57.1W), CAI – 18 (-19, 50.5W), CAO – 4 (-19, 40.4W), HA_ – 2 (-8, 08.4W), HK_ – 13 (-21, 15.6E), BXO – 5 (-15, 58.2E), AX_ – 1 (-27, 61.6E), HA_ – 1 (-15, 69.8E)
12 175 AX_ – 1 (23, 76.1W), ESC – 10 (25, 51.4W), DAC – 16 (10, 30.9W), AX_ – 4 (24, 13.7W), FAC – 6 (24, 77.7E), HS_ – 1 (-10, 74.5W), BXI – 8 (-19, 59.7W), HS_ – 1 (-8, 21.1W), HA_ – 11 (-21, 03.4E), BXI – 5 (-15, 45.1E), CSI – 2 (-15, 58E)
13 154 DSI – 6 (25, 65.5W), EKI – 21 (11, 45W), FHC – 17 (23, 64.2E), AX_ – 3 (-8, 33.1W), DKI – 25 (-22, 08.9W), CRI – 10 (-15, 32.2E), HS_ – 2 (-15, 43.9E)
14 192 HS_ – 1 (26, 79.3W), EAI – 17 (11, 57.1W), FAC – 16 (24, 51.7E), HS_ – 2 (7, 74.6E), HS_ – 2 (11, 84.2E), AX_ – 2 (-7, 47.8W), HK_ – 33 (-21, 22.1W), AX_ – 2 (-14, 13.9E), AX_ – 3 (-15, 30.4E), AX_ – 2 (-21, 39.3E), AX_ – 2 (-7, 80E)
15 128 DAI – 5 (11, 73.3W), FKI – 20 (23, 37.6E), DAI – 9 (9, 63.5E), HK_ – 18 (-22, 35.4W), CRO – 2 (-15, 17.9E), AX_ – 2 (-22, 25.8E), AX_ – 2 (-7, 63.5E)
16 189 BXI – 3 (12, 76.6W), AX_ – 5 (13, 28.5W), AX_ – 6 (19, 21.7W), FKC – 26 (23, 24E), EKC – 28 (8, 50.6E), BXO – 3 (24, 65.6E), EKI – 11 (-22, 47.5W), CSI – 3 (-16, 05.1E), AX_ – 1 (-23, 13.3E), HR_ – 3 (-8, 51.5E)
17 132 BXO – 4 (13, 42.6W), AX_ – 1 (21, 35.2W), FSI – 14 (23, 11.6E), DSC – 11 (7, 35.8E), BXO – 4 (24, 52.7E), CAO – 5 (-22, 61.7W), AX_ – 1 (-15, 09.5W), AX_ – 1 (-7, 37.8E), AX_ – 1 (-10, 83.5E)
18 178 BXI – 3 (13, 55.3W), DHI – 4 (23, 00.8W), DAC – 17 (24, 04.9E), EKC – 22 (7, 23.1E), DAI – 19 (24, 40.6E), CKI – 5 (-22, 74.3W), AX_ – 1 (-16, 22W), HA_ – 3 (-7, 25.1E), AX_ – 1 (-26, 72E), DHI – 3 (-9, 73E)
19 141 HS_ – 2 (22, 19.2W), CSI – 10 (24, 08.5W), EAI – 23 (6, 08.9E), DSI – 9 (24, 26.1E), CSI – 3 (15, 79.8E), AX_ – 2 (-8, 11.5E), CSI – 9 (-26, 23.7E), CSI – 3 (-9, 58.4E)
20 176 FHC – 22 (24, 26.3W), EKC – 35 (8, 04.5W), CSI – 21 (24, 13.8E), HR_ – 1 (19, 69.8E), CHI – 7 (14, 72.6E), CRI – 13 (-26, 10.5E), DHI – 7 (-9, 44.4E)
21 142 FKO – 15 (23, 39.4W), EAC – 20 (9, 18.2W), CSI – 9 (24, 00.6E), HA_ – 1 (19, 57.4E), CAI – 6 (15, 60.5E), CAO – 6 (-26, 02.4W), CAI – 4 (-9, 31.9E), AX_ – 1 (-42, 60.3E)
22 121 CAO – 6 (23, 54.5W), FAI – 23 (8, 33.1W), HS_ – 2 (23, 16W), CSI – 9 (16, 45.6E), AX_ – 1 (-17, 21.5W), AX_ – 5 (-25, 20W), CAO – 5 (-8, 16.2E)
23 152 HH_ – 1 (23, 75.8W), AX_ – 2 (26, 61.5W), FSI – 19 (9, 47.1W), HA_ – 3 (24, 29.9W), HH_ – 5 (15, 25.8E), HS_ – 3 (20, 30.4E), AX_ – 1 (17, 36.2E), AX_ – 1 (15, 41.3E), HS_ – 2 (-25, 33.9W), AX_ – 1 (-16, 33W), DAO – 4 (-7, 03.4E)
24 121 DSI – 9 (9, 57.6W), CSO – 3 (22, 41.7W), HS_ – 2 (13, 11.6E), AX_ – 1 (19, 15.8E), AX_ – 1 (15, 26.8E), BXO – 4 (-17, 46.6W), AX_ – 2 (-26, 45.9W), DSI – 5 (-8, 10.4W), CAO – 4 (-11, 67E)
25 127 DAO – 2 (10, 67.6W), DAI – 6 (22, 54.8W), HK_ – 10 (15, 00.5E), HA_ – 1 (19, 04E), AX_ – 2 (16, 15.4E), HA_ – 1 (-26, 58W), AX_ – 1 (-18, 57.9W), DAO – 2 (-8, 23.1W), CAI – 12 (-10, 56.2E)
26 131 ?__ – 2 (10, 79.3W), DAC – 5 (23, 67.9W), AX_ – 2 (19, 08.6W), CAO – 8 (13, 08.4W), BXI – 6 (12, 70.6E), ?__ – 1 (-26, 70.6W), DAO – 2 (-8, 36.1W), CRI – 4 (-15, 07.7W), CAI – 11 (-13, 44.6E)
27 71 HS_ – 1 (15, 25W), DSI – 5 (11, 58.3E), HS_ – 1 (18, 79.5E), DSO – 2 (-7, 49W), HS_ – 1 (-15, 23.9W), HS_ – 1 (-11, 25E)
28 127 HS_ – 1 (14, 40.6W), ESC – 22 (12, 43.7E), CSO – 3 (20, 64.6E), DSO – 2 (-9, 66.2W), HS_ – 1 (-15, 40.8W), CSI – 14 (-10, 09.6E), CSO – 3 (-24, 59.2E), HS_ – 1 (-10, 71.5E)
29 174 HS_ – 1 (14, 51W), DAI – 18 (12, 32.5E), CAI – 6 (20, 53.9E), HS_ – 1 (24, 85.8E), HA_ – 2 (-8, 75.9W), AX_ – 1 (-15, 52.6W), DAI – 27 (-10, 00.2W), HA_ – 3 (-23, 44.4E), AX_ – 2 (-23, 51.4E), HS_ – 2 (-9, 59.3E), AX_ – 1 (-17, 68.1E)
30 193 HA_ – 1 (14, 66.5W), EAI – 20 (12, 17E), HA_ – 4 (21, 38.6E), HA_ – 1 (24, 72.5E), BXO – 2 (9, 72.8E), AX_ – 1 (-15, 68W), DAC – 26 (-10, 15.8W), AX_ – 6 (-15, 00.9W), CAO – 3 (-23, 33.3E), AX_ – 2 (-12, 43E), HA_ – 2 (-9, 44.3E), BXO – 5 (-19, 55.4E)
31 158 AX_ – 1 (14, 78.7W), ESI – 13 (11, 01.9E), CSI – 7 (22, 26.3E), AX_ – 1 (17, 33.7E), BXO – 3 (9, 57.8E), HA_ – 1 (23, 59.3E), DAI – 14 (-10, 30.7W), AX_ – 3 (-17, 14.2W), AX_ – 1 (-23, 16.6E), HS_ – 1 (-9, 29.9E), BXO – 3 (-19, 41.9E)