Daily Sunspot Evaluation
Observation Sheet Sunday, 5 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)
- 2
- Number of spots (f)
- 10
- Relative number (R)
- 30
- Observer
- TÖ
- Reading
- all checks consistent
- File
- 19870405.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HSX – 1 | 5 | 63W | 296 | 65W | 2 | 13 |
| 2 | BRO – 9 | -22 | 54E | 179 | 52E | 6 | 15 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.