Daily Sunspot Evaluation
Observation Sheet Thursday, 24 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)
- 3
- Number of spots (f)
- 4
- Relative number (R)
- 34
- Observer
- HM
- Reading
- all checks consistent
- File
- 19870924.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HSX – 2 | 13 | 12W | 132 | 15W | 2 78 | 68 |
| 2 | HAX – 1 | -30 | 70W | 190 | 73W | 2 79 | 69 |
| 3 | AXX – 1 | -21 | 52E | 68 | 49E | -80 | 70 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.