Daily Sunspot Evaluation
Observation Sheet Friday, 12 August 1988
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)
- 9
- Number of spots (f)
- 87
- Relative number (R)
- 177
- Observer
- SG0
- Reading
- all checks consistent
- File
- 19880812.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | EKC – 20 | 23 | 27W | 204 | 30W | 11 | 165 |
| 2 | BRO – 4 | 29 | 25W | 202 | 28W | 4.5 | 166 |
| 3 | BRI – 5 | 32 | 17W | 194 | 20W | 4 | 167 |
| 4 | EKC – 23 | 17 | 17E | 160 | 14E | 12 | 170 |
| 5 | DKC – 26 | 23 | 21E | 156 | 18E | 8.5 | 171 |
| 6 | ? – 2 | -13 | 80W | 257 | 83W | - | 168 |
| 7 | HA – 3 | -19 | 4E | 173 | 1E | 4 | 169 |
| 8 | HK – 1 | -21 | 27E | 150 | 24E | 3.5 | 173 |
| 9 | BRO – 3 | -19 | 33E | 144 | 30E | 4 | 174 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.