Daily Sunspot Evaluation
Observation Sheet Monday, 18 July 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)
- 4
- Number of spots (f)
- 26
- Relative number (R)
- 66
- Observer
- HE
- Reading
- all checks consistent
- File
- 19880718.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HA – 1 | -16 | 14W | 162 | 18W | 2 | 143 |
| 2 | EKC – 20 | -21 | 1W | 149 | 5W | 12.5 | 144 |
| 3 | CAO – 3 | -15 | 5E | 142 | 1E | 2 | 145 |
| 4 | BXO – 2 | -21 | 64E | 84 | 60E | 7 | 146 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.