Daily Sunspot Evaluation
Observation Sheet Friday, 28 January 2000
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)
- 31
- Relative number (R)
- 71
- Observer
- HE
- Reading
- all checks consistent
- File
- 20000128.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | EAC – 15 | 5 | 66W | 74 | 68W | 12.5 | |
| 2 | CAO – 4 | -17 | 11W | 19 | 13W | 4 | |
| 3 | CAO – 7 | -30 | 11W | 19 | 13W | 10 | |
| 4 | CAO – 5 | -10 | 64E | 304 | 62E | 8 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.