Daily Sunspot Evaluation
Observation Sheet Thursday, 8 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)
- 40
- Relative number (R)
- 120
- Observer
- TA
- Reading
- all checks consistent
- File
- 19910808.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | EK – 13 | 23 | 68W | 245 | 7W | 15 | 413 |
| 2 | AR – 1 | 10 | 13E | 164 | 10E | 0.5 | 422 |
| 3 | CAO – 6 | 9 | 56E | 121 | 53E | 4.5 | 428 |
| 4 | CAI – 5 | -18 | 70W | 247 | 7W | 7 | 414 |
| 5 | BRO – 4 | -33 | 05W | 182 | 08W | 11.5 | 421 |
| 6 | HA – 4 | -25 | 17E | 160 | 14E | 4.5 | 423 |
| 7 | BAI – 6 | -14 | 43E | 134 | 40E | 5 | 423 |
| 8 | HS – 1 | -24 | 63E | 114 | 60E | 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.