Daily Sunspot Evaluation
Observation Sheet Friday, 20 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)
- 6
- Number of spots (f)
- 32
- Relative number (R)
- 92
- Observer
- ZFB
- Reading
- all checks consistent
- File
- 20040820.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DKO – 8 | 6 | 09W | 346 | 12W | 8.5 | 151 |
| 2 | AX – 1 | 13 | 07W | 344 | 10W | 152 | |
| 3 | DAI – 12 | 13 | 09E | 328 | 06E | 4.5 | 153 |
| 4 | AX – 2 | 4 | 21E | 316 | 18E | 1 | 155 |
| 5 | ? – 4 | 10 | 74E | 263 | 71E | 13 | 154 |
| 6 | DRO – 5 | -11 | 49E | 288 | 46E | 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.