Daily Sunspot Evaluation
Observation Sheet Saturday, 10 August 1991
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)
- 8
- Number of spots (f)
- 20
- Relative number (R)
- 100
- Observer
- SG0
- Reading
- all checks consistent
- File
- 19910810.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AB – 1 | 10 | 13W | 164 | 16W | 0.5 | 422 |
| 2 | CAO – 5 | 9 | 30E | 121 | 27E | 3.5 | 429 |
| 3 | DAO – 7 | 4 | 64E | 87 | 61E | 8 | 432 |
| 4 | AX – 2 | -34 | 38W | 189 | 41W | 0.5 | 421 |
| 5 | HA – 2 | -25 | 10W | 161 | 13W | 2.5 | 423 |
| 6 | AX – 1 | -19 | 19E | 132 | 16E | - | 433 |
| 7 | AX – 1 | -15 | 22E | 129 | 19E | - | 423 |
| 8 | HS – 1 | -25 | 38E | 113 | 35E | 2.5 | 431 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.