Daily Sunspot Evaluation
Observation Sheet Monday, 25 April 1983
There is no typed record for this day. The values below were read by computer from the table on the sheet; when in doubt, see the drawing. Details →
- Number of groups (g)
- 9
- Number of spots (f)
- 52
- Relative number (R)
- 142
- Observer
- AÖ0
- Reading
- all checks consistent
- File
- 19830425.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAI – 13 | 11 | 47W | 221 | 50W | 8.25 | 96 |
| 2 | AXX – 1 | 15 | 09W | 183 | 12W | 105 | |
| 3 | BXO – 2 | 8 | 02E | 172 | 01W | 2.5 | 106 |
| 4 | CAI – 3 | 13 | 40E | 134 | 37E | 5 | 107 |
| 5 | HKX – 10 | -12 | 02W | 176 | 05W | 5 | 99 |
| 6 | DKO – 8 | -12 | 39E | 135 | 36E | 7 | 102 |
| 7 | DKC – 11 | -18 | 49E | 125 | 46E | 6E | 103 |
| 8 | HKX – 2 | -4 | 65E | 109 | 62E | 3.5 | 104 |
| 9 | ? – 2 | -5 | 72E | 102 | 69E | 4 | 108 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.