Daily Sunspot Evaluation
Observation Sheet Thursday, 20 May 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)
- 30
- Relative number (R)
- 90
- Observer
- ıH
- Reading
- all checks consistent
- File
- 20040520.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HA – 3 | 10 | 74W | 189 | 77W | 2 | 85 |
| 2 | HA – 4 | 16 | 22E | 93 | 19E | ~2 | 88 |
| 3 | DAO – 6 | -3 | 62W | 177 | 65W | 9 | 83 |
| 4 | DAI – 11 | -11 | 23W | 138 | 26W | ~5 | 90 |
| 5 | HA – 1 | -9 | 05W | 120 | 08W | ~2 | 86 |
| 6 | ? – 5 | -12 | 78E | 37 | 75E | ? | 91 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.