Daily Sunspot Evaluation
Observation Sheet Thursday, 18 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)
- 5
- Number of spots (f)
- 13
- Relative number (R)
- 63
- Observer
- HÇ
- Reading
- all checks consistent
- File
- 19880818.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HK – 3 | 14 | 68W | 164 | 69W | 5 | 170 |
| 2 | DRO – 3 | 22 | 60W | 156 | 61W | 8 | 171 |
| 3 | BXO – 2 | 22 | 55W | 151 | 56W | 5 | 178 |
| 4 | ? – 1 | 14 | 83E | 13 | 82E | - | 183 |
| 5 | HK – 4 | -22 | 54W | 150 | 55W | 6 | 184 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.