Daily Sunspot Evaluation
Observation Sheet Friday, 13 November 1981
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)
- 15
- Number of spots (f)
- 90
- Relative number (R)
- 240
- Observer
- HM
- Reading
- all checks consistent
- File
- 19811113.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AXX – 1 | 1 | 64W | 3 | 67W | ||
| 2 | CAI – 15 | 3 | 27W | 326 | 30W | 105 | |
| 3 | DKC – 29 | 17 | 23W | 322 | 26W | 35 | |
| 4 | ARX – 5 | 21 | 16W | 315 | 19W | 3 | |
| 5 | DSO – 4 | 14 | 06W | 305 | 09W | 55 | |
| 6 | AXX – 1 | 12 | 02E | 297 | 0W | ||
| 7 | HHX – 7 | 17 | 19E | 280 | 16E | 5 | |
| 8 | AXX – 1 | 19 | 25E | 274 | 22E | ||
| 9 | HAX – 1 | -3 | 66W | 5 | 69W | 15 | |
| 10 | HAX – 1 | -13 | 66W | 5 | 69W | 2 | |
| 11 | DKC – 19 | -18 | 36W | 335 | 39W | 9.5 | |
| 12 | AXX – 1 | -14 | 23W | 322 | 26W | ||
| 13 | AXX – 1 | -18 | 20W | 321 | 25W | ||
| 14 | BXO – 3 | -13 | 17E | 282 | 14E | 35 | |
| 15 | ? – 1 | -6 | 75E | 224 | 72E | 4 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.