Daily Sunspot Evaluation
Observation Sheet Friday, 9 October 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)
- 7
- Relative number (R)
- 37
- Observer
- HG
- Reading
- all checks consistent
- File
- 19871009.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HAX – 2 | 30 | 52W | 332 | 53W | 2 | 72 |
| 2 | HAX – 2 | 22 | 85E | 195 | 84E | 85 | 76 |
| 3 | BXO – 3 | -24 | 18E | 262 | 19E | 4.5 | 77 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.