Daily Sunspot Evaluation
Observation Sheet Friday, 13 June 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)
- 133
- Relative number (R)
- 253
- Observer
- ET
- Reading
- all checks consistent
- File
- 19580613.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 15 | 16 | 63E | ||||
| 2 | A – 1 | 9 | 54E | ||||
| 3 | ? – 2 | -26 | 74E | ||||
| 4 | J – 4 | -24 | 28E | ||||
| 5 | A – 5 | -18 | 14W | ||||
| 6 | B – 9 | -25 | 21W | ||||
| 7 | A – 4 | -17 | 34W | ||||
| 8 | A – 1 | -21 | 51W | ||||
| 9 | J – 2 | -23 | 65W | ||||
| 10 | C – 8 | 16 | 35W | ||||
| 11 | F – 57 | 28 | 38W | ||||
| 12 | E – 25 | 44 | 40W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.