Daily Sunspot Evaluation
Observation Sheet Friday, 13 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)
- 5
- Number of spots (f)
- 101
- Relative number (R)
- 151
- Observer
- ıH
- Reading
- all checks consistent
- File
- 20040813.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HA – 2 | 11 | 06W | 76 | 08W | -1 | 148 |
| 2 | HA – 2 | 17 | 29E | 41 | 27E | -1 | 149 |
| 3 | ? – 2 | 7 | 84E | 346 | 82E | ? | 151 |
| 4 | FKC – 93 | -12 | 16W | 86 | 18W | -17 | 146 |
| 5 | DAO – 2 | -8 | 43E | 27 | 41E | -7 | 150 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.