Daily Sunspot Evaluation
Observation Sheet Saturday, 21 August 2004
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)
- 54
- Relative number (R)
- 94
- Observer
- ZFB
- Reading
- all checks consistent
- File
- 20040821.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DKO – 10 | 7 | 24W | 348 | 27W | 7.5 | 151 |
| 2 | DAI – 12 | 13 | 04W | 328 | 07W | 5.5 | 152 |
| 3 | ESO – 12 | 9 | 61E | 263 | 58E | -14 | 154 |
| 4 | DAI – 20 | -11 | 34E | 290 | 31E | 8.5 | 156 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.