Daily Sunspot Evaluation
Observation Sheet Monday, 19 October 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)
- 10
- Number of spots (f)
- 139
- Relative number (R)
- 239
- Observer
- OG
- Reading
- all checks consistent
- File
- 19811019.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ARX – 2 | 13 | 62W | 331 | 65W | 0.5 | |
| 2 | HKX – 4 | 19 | 60W | 329 | 63W | 4 | |
| 3 | AXX – 1 | 19 | 21E | 248 | 18E | - | |
| 4 | AXX – 1 | 9 | 73E | 196 | 70E | - | |
| 5 | FKC – 34 | -18 | 62W | 331 | 65W | 32 | |
| 6 | FKC – 62 | -9 | 04W | 273 | 07W | 16 | |
| 7 | AXX – 2 | -29 | 11E | 258 | 08E | 2 | |
| 8 | EKC – 26 | -8 | 20E | 249 | 17E | 11 | |
| 9 | CAI – 6 | -9 | 32E | 237 | 29E | 7 | |
| 10 | AXX – 1 | -8 | 70E | 199 | 67E | - |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.