Daily Sunspot Evaluation
Observation Sheet Sunday, 4 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)
- 11
- Number of spots (f)
- 49
- Relative number (R)
- 159
- Observer
- SB0
- Reading
- all checks consistent
- File
- 20010204.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HS – 2 | 3 | 67W | 192 | 69W | 2 | |
| 2 | HS – 3 | 12 | 55W | 180 | 57W | 2 | |
| 3 | CSO – 3 | 20 | 46W | 171 | 48W | 7 | |
| 4 | CSI – 10 | 27 | 08E | 117 | 06E | 8 | |
| 5 | CAI – 13 | 17 | 45E | 80 | 43E | 11 | |
| 6 | DAC – 7 | 15 | 60E | 65 | 58E | 8 | |
| 7 | AX – 1 | -30 | 58W | 183 | 60W | ||
| 8 | HR – 4 | -11 | 05W | 130 | 07W | 2.5 | |
| 9 | HA – 3 | -10 | 70E | 55 | 68E | 3.5 | |
| 10 | AX – 2 | -20 | 71E | 54 | 69E | 1 | |
| 11 | ? – 1 | -2 | 84E | 41 | 82E |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.