Daily Sunspot Evaluation
Observation Sheet Saturday, 13 August 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)
- 7
- Number of spots (f)
- 69
- Relative number (R)
- 139
- Observer
- AÖ0
- Reading
- all checks consistent
- File
- 19830813.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HSX – 1 | 5 | 51E | 107 | 48E | 1.5 | 246 |
| 2 | HAX – 1 | 17 | 71E | 87 | 68E | 2 | 249 |
| 3 | FKC – 49 | -8 | 03E | 155 | 15E | 244 | |
| 4 | HSX – 1 | -4 | 03E | 155 | 243 | ||
| 5 | CAI – 9 | -7 | 15E | 143 | 12E | 4 | 245 |
| 6 | HRX – 1 | -5 | 43E | 115 | 40E | 0.5 | 247 |
| 7 | BXO – 7 | -20 | 48E | 110 | 45E | 8 | 248 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.