Daily Sunspot Evaluation
Observation Sheet Saturday, 19 February 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)
- 4
- Number of spots (f)
- 8
- Relative number (R)
- 48
- Observer
- SB0
- Reading
- all checks consistent
- File
- 20050219.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AX – 3 | 13 | 25W | 109 | 27W | ~1.5 | |
| 2 | HS – 1 | -8 | 69W | 153 | 71W | ~2 | |
| 3 | HS – 1 | -5 | 53W | 137 | 55W | ~1 | |
| 4 | HH – 3 | -10 | 36W | 120 | 38W | ~4.5 | Hk-3 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.