Daily Sunspot Evaluation
Observation Sheet Friday, 9 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)
- 12
- Number of spots (f)
- 121
- Relative number (R)
- 241
- Observer
- GT
- Reading
- all checks consistent
- File
- 19811009.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | EKC – 11 | 13 | 77W | 114 | 80W | 135 | |
| 2 | AXX – 3 | 6 | 62W | 102 | 65W | 3 | |
| 3 | HSX – 2 | 8 | 27W | 64 | 30W | 2 | |
| 4 | AXX – 8 | 12 | 08W | 48 | 11W | 3 | |
| 5 | BXO – 3 | 16 | 54E | 346 | 51E | 5 | |
| 6 | CAO – 3 | 19 | 64E | 334 | 61E | 11 | |
| 7 | DAO – 8 | -9 | 57W | 97 | 60W | 9 | |
| 8 | BXO – 3 | -23 | 46W | 86 | 49W | 4 | |
| 9 | CAI – 10 | -6 | 35W | 75 | 38W | 6 | |
| 10 | EAC – 40 | -10 | 14W | 54 | 17W | 11 | |
| 11 | CSI – 11 | -12 | 43E | 357 | 40E | 45 | |
| 12 | EKC – 19 | -19 | 66E | 334 | 63E | 14 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.