Daily Sunspot Evaluation
Observation Sheet Tuesday, 14 April 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)
- 4
- Number of spots (f)
- 21
- Relative number (R)
- 61
- Observer
- TÖ
- Reading
- all checks consistent
- File
- 19870414.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HAX – 1 | 25 | 42E | 72 | 40E | 2 | 20 |
| 2 | HAX – 1 | -24 | 68W | 182 | 70W | 2 | 15 |
| 3 | HAX – 2 | -7 | 12W | 126 | 14W | 2 | 13 |
| 4 | EAS – 17 | -32 | 16W | 130 | 18W | 16 | 16 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.