Daily Sunspot Evaluation
Observation Sheet Friday, 9 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)
- 22
- Relative number (R)
- 102
- Observer
- TA
- Reading
- all checks consistent
- File
- 19910809.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | EKC – 4 | 24 | 84W | 245 | 84W | 16 | 415 |
| 2 | AR – 1 | 10 | 01E | 163 | 02W | 0.5 | 422 |
| 3 | CAO – 4 | 9 | 44E | 120 | 41E | 4 | 428 |
| 4 | CAO – 4 | 4 | 76E | 88 | 78E | 5 | 432 |
| 5 | BBO – 2 | -33 | 18W | 182 | 21W | 12 | 421 |
| 6 | HA – 3 | -25 | 03E | 161 | 00 | 2 | 423 |
| 7 | BAO – 3 | -14 | 29E | 135 | 26E | 2 | 429 |
| 8 | HS – 1 | -25 | 51E | 113 | 48E | 2.5 | 432 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.