Daily Sunspot Evaluation
Observation Sheet Wednesday, 16 April 1958
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)
- 7
- Number of spots (f)
- 27
- Relative number (R)
- 97
- Observer
- MH
- Reading
- all checks consistent
- File
- 19580416.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 1 | 40 | 60E | ||||
| 2 | C – 3 | 21 | 39E | ||||
| 3 | C – 2 | 17 | 37E | ||||
| 4 | C – 14 | -21 | 64E | ||||
| 5 | C – 4 | -11 | 44W | ||||
| 6 | ? – 1 | 12 | 79W | ||||
| 7 | B – 2 | 7 | 16W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.