Daily Sunspot Evaluation
Observation Sheet Wednesday, 15 April 1959
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)
- 11
- Number of spots (f)
- 69
- Relative number (R)
- 179
- Observer
- FY
- Reading
- all checks consistent
- File
- 19590415.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 17 | 25E | ||||
| 2 | J – 2 | 11 | 33E | ||||
| 3 | C – 6 | -10 | 0 | ||||
| 4 | E – 23 | -16 | 16W | ||||
| 5 | J – 1 | -21 | 76W | ||||
| 6 | D – 11 | 0 | 37W | ||||
| 7 | J – 1 | 12 | 72W | ||||
| 8 | J – 1 | 12 | 59W | ||||
| 9 | A – 1 | 22 | 56W | ||||
| 10 | J – 5 | 9 | 22W | ||||
| 11 | E – 17 | 25 | 4W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.