Daily Sunspot Evaluation
Observation Sheet Friday, 21 February 2003
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)
- 50
- Relative number (R)
- 100
- Observer
- ZFB
- Reading
- all checks consistent
- File
- 20030221.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 5 | 8 | 82W | 68 | 84W | ~5 | 41 |
| 2 | HA – 5 | 13 | 03W | 349 | 05W | 2.5 | 40 |
| 3 | BXO – 3 | 12 | 02E | 344 | 00 | ~3 | 43 |
| 4 | EAC – 30 | 17 | 15E | 331 | 13E | 11 | 42 |
| 5 | BXO – 7 | -23 | 12E | 334 | 10E | ~5 | 44 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.