Daily Sunspot Evaluation
Observation Sheet Wednesday, 28 February 2001
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)
- 28
- Relative number (R)
- 78
- Observer
- SB0
- Reading
- all checks consistent
- File
- 20010228.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CAI – 16 | 11 | 22W | 192 | 25W | 8 | |
| 2 | HS – 1 | -12 | 27W | 197 | 30W | 1 | |
| 3 | AX – 2 | -14 | 16W | 186 | 19W | 1 | |
| 4 | CSI – 7 | -11 | 06W | 176 | 09W | 2.5 | |
| 5 | AX – 2 | -9 | 48E | 122 | 45E | ~2 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.