Daily Sunspot Evaluation
Observation Sheet Sunday, 27 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)
- 12
- Number of spots (f)
- 68
- Relative number (R)
- 188
- Observer
- ET
- Reading
- all checks consistent
- File
- 19580427.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 2 | 12 | 16E | ||||
| 2 | J – 1 | 28 | 49E | ||||
| 3 | E – 17 | 17 | 61E | ||||
| 4 | ? – 11 | -15 | 77E | ||||
| 5 | J – 1 | -17 | 59E | ||||
| 6 | A – 1 | -25 | 53E | ||||
| 7 | H – 1 | -17 | 27E | ||||
| 8 | C – 3 | 14 | 57W | ||||
| 9 | B – 2 | 8 | 27W | ||||
| 10 | E – 24 | 12 | 74W | ||||
| 11 | A – 1 | 10 | 4W | ||||
| 12 | J – 4 | 16 | 1W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.