Daily Sunspot Evaluation
Observation Sheet Sunday, 11 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)
- 7
- Number of spots (f)
- 24
- Relative number (R)
- 94
- Observer
- HÇ0
- Reading
- counts consistent, some coordinates doubtful
- File
- 19910811.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AR – 1 | 10 | 21W | 164 ⚠ | 30W | 0.5 | 422 |
| 2 | CAI – 5 | 8 | 17E | 120 | 14E | 4 | 428 |
| 3 | DAC – 8 | 4 | 48E | 89 | 45E | 4 | 432 |
| 4 | HA – 2 | -24 | 23W | 160 | 26W | 2 | 423 |
| 5 | BRI – 4 | -14 | 05E | 132 | 02E | 6.5 | 429 |
| 6 | HH – 1 | -24 | 24E | 113 | 21E | 3 | 431 |
| 7 | ? – 3 | -22 | 77E | 60 | 74E | 5 | 434 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.