Daily Sunspot Evaluation
Observation Sheet Tuesday, 18 August 1998
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)
- 22
- Relative number (R)
- 92
- Observer
- HÇ0
- Reading
- counts consistent, some coordinates doubtful
- File
- 19980818.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HS – 2 | 32 | 72W | 208 | 75W | 5 | 166 |
| 2 | DAC – 5 | 17 | 60W | 196 | 62W | 9 | 169 |
| 3 | HS – 1 | 26 | 52E | 84 | 49E | 1.5 | 182 |
| 4 | CSO – 5 | -32 | 40E | 96 | 37E | 13 | 181 |
| 5 | ? – 1 | -23 | 80E | 56 | 77E | ? | 183 |
| 6 | ESO – 3 | -22 | 38W | 168 ⚠ | 36W | 12 | 171 |
| 7 | CRO – 5 | -25 | 26W | 161 | 29W | 6 | 178 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.