Daily Sunspot Evaluation
Observation Sheet Monday, 7 July 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)
- 16
- Number of spots (f)
- 158
- Relative number (R)
- 318
- Observer
- SG
- Reading
- all checks consistent
- File
- 19580707.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | F – 38 | 28 | 1E | ||||
| 2 | A – 1 | 22 | 11E | ||||
| 3 | A – 2 | 16 | 10E | ||||
| 4 | A – 1 | 31 | 30E | ||||
| 5 | E – 15 | 32 | 48E | ||||
| 6 | ? – 3 | -22 | 78E | ||||
| 7 | H – 4 | -23 | 12E | ||||
| 8 | H – 4 | -24 | 2W | ||||
| 9 | J – 2 | -16 | 16W | ||||
| 10 | B – 27 | 5 | 38W | ||||
| 11 | J – 2 | 11 | 75W | ||||
| 12 | C – 13 | 12 | 51W | ||||
| 13 | C – 6 | 21 | 35W | ||||
| 14 | A – 1 | 33 | 47W | ||||
| 15 | C – 38 | 27 | 17W | ||||
| 16 | A – 1 | 20 | 4W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.