Daily Sunspot Evaluation
Observation Sheet Thursday, 9 October 1986
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)
- 2
- Number of spots (f)
- 15
- Relative number (R)
- 35
- Observer
- TS
- Reading
- all checks consistent
- File
- 19861009.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CAI – 9 | 35 | 35W | 94 | 37W | 6.11 | |
| 2 | BRI – 6 | -3 | 21W | 80 | 23W | 5.54 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.