Daily Sunspot Evaluation
Observation Sheet Thursday, 20 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)
- 34
- Relative number (R)
- 104
- Observer
- HÇ0
- Reading
- all checks consistent
- File
- 19980820.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 1 | 16 | 86W | 195 | 89W | 7 | 169 |
| 2 | HA – 1 | 26 | 27E | 82 | 24E | 1.5 | 182 |
| 3 | CRI – 10 | 16 | 25E | 84 | 22E | 5 | 185 |
| 4 | ? – 10 | 30 | 71E | 38 | 68E | 7 | 184 |
| 5 | HA – 1 | -22 | 65W | 174 | 68W | 2.5 | 171 |
| 6 | CSO – 9 | -30 | 15E | 94 | 12E | 13 | 181 |
| 7 | HA – 2 | -23 | 56E | 53 | 53E | 2.5 | 183 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.