Daily Sunspot Evaluation
Observation Sheet Friday, 21 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)
- 33
- Relative number (R)
- 103
- Observer
- NA
- Reading
- all checks consistent
- File
- 19980821.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DSI – 13 | 16 | 12E | 84 | 09E | 7 | 185 |
| 2 | CAO – 4 | 27 | 16E | 80 | 13E | 5 | 182 |
| 3 | DKO – 10 | 30 | 57E | 39 | 54E | 9.5 | 184 |
| 4 | DSO – 2 | 21 | 64E | 32 | 61E | 6 | 186 |
| 5 | HS – 1 | -23 | 77W | 173 | 80W | 5 | 191 |
| 6 | HA – 1 | -31 | 04W | 103 | 07W | 1.5 | 181 |
| 7 | HS – 2 | -23 | 42E | 54 | 39E | 2 | 183 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.