Daily Sunspot Evaluation
Observation Sheet Tuesday, 22 September 1987
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)
- 4
- Relative number (R)
- 24
- Observer
- FL
- Reading
- all checks consistent
- File
- 19870922.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HAX – 1 | 13 | 12E | 133 | 10E | 2.78 | 68 |
| 2 | CAO – 3 | -30 | 49W | 194 | 54W | 8.79 | 69 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.