Daily Sunspot Evaluation
Observation Sheet Friday, 15 May 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)
- 5
- Relative number (R)
- 35
- Observer
- HG
- Reading
- all checks consistent
- File
- 19870515.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HAX – 1 | 28 | 78E | 347 | 75E | 3 | 31 |
| 2 | HSX – 1 | -32 | 47W | 112 | 50W | 2 | 27 |
| 3 | ? – 3 | -25 | 76E | 349 | 73E | 7 | 32 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.