Daily Sunspot Evaluation
Observation Sheet Monday, 28 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)
- 13
- Number of spots (f)
- 181
- Relative number (R)
- 311
- Observer
- SG
- Reading
- all checks consistent
- File
- 19580728.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 10 | 20 | 2E | ||||
| 2 | B – 12 | 27 | 63E | ||||
| 3 | H – 17 | 16 | 21E | ||||
| 4 | A – 1 | 14 | 65E | ||||
| 5 | D – 21 | 7 | 37E | ||||
| 6 | A – 1 | 1 | 30E | ||||
| 7 | A – 1 | -10 | 18E | ||||
| 8 | C – 21 | -17 | 5W | ||||
| 9 | F – 86 | -15 | 27W | ||||
| 10 | A – 1 | -14 | 65W | ||||
| 11 | A – 4 | -3 | 32W | ||||
| 12 | B – 5 | 17 | 34W | ||||
| 13 | A – 1 | 35 | 54W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.