Monthly Sunspot Classification and Coordinates
April 2021 Monthly report →
Each group: class – number of spots (B, ΔL). NS: No sunspot.
| Drawing | Day | R | Classification and Coordinates |
|---|---|---|---|
| Drawing | 01 | 0 | NS |
| Drawing | 02 | 0 | NS |
| Drawing | 06 | 11 | AX_ – 1 (18, 55.6W) |
| Drawing | 07 | 0 | NS |
| Drawing | 09 | 0 | NS |
| Drawing | 12 | 13 | BXI – 3 (-21, 19.1E) |
| Drawing | 13 | 32 | CRI – 22 (-22, 04.2E) |
| Drawing | 14 | 26 | DRI – 16 (-22, 08.1W) |
| Drawing | 15 | 36 | CRI – 15 (-23, 20.6W), AX_ – 1 (-21, 01.6E) |
| Drawing | 16 | 25 | AX_ – 1 (-19, 64.5E), BXO – 4 (-22, 69E) |
| Drawing | 20 | 67 | DAC – 16 (17, 50.7W), AX_ – 1 (13, 36.3W), DAC – 9 (-25, 17.8E), HS_ – 1 (-17, 74.6E) |
| Drawing | 21 | 39 | CSO – 2 (19, 64.6W), CSI – 6 (-25, 05.2E), AX_ – 1 (-17, 61.3E) |
| Drawing | 22 | 53 | AX_ – 3 (19, 75.8W), BXI – 6 (-22, 11.4W), HS_ – 3 (-27, 04.2W), HS_ – 1 (-16, 47.4E) |
| Drawing | 26 | 65 | AX_ – 1 (24, 46.4W), CAI – 7 (-22, 18W), DAI – 16 (-22, 08.7W), HS_ – 1 (-16, 02.7W) |
| Drawing | 27 | 56 | DAI – 11 (-22, 31.9W), DAI – 14 (-22, 21.8W), HS_ – 1 (-16, 16.5W) |
| Drawing | 28 | 40 | DAI – 5 (-22, 45.5W), DAI – 4 (-23, 34.9W), HS_ – 1 (-16, 29.1W) |
| Drawing | 29 | 44 | CSI – 8 (-23, 58.6W), DAI – 5 (-23, 47.7W), HS_ – 1 (-16, 42.7W) |
