Daily Sunspot Evaluation
Observation Sheet Thursday, 7 April 2005
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)
- 3
- Number of spots (f)
- 12
- Relative number (R)
- 42
- Observer
- TG
- Reading
- all checks consistent
- File
- 20050407.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAO – 3 | -7 | 64W | 249 | 67W | 6.10 | |
| 2 | HS – 2 | -6 | 21E | 164 | 18E | -1.5 | |
| 3 | HS – 7 | -9 | 62E | 123 | 59E | 4 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.