Daily Sunspot Evaluation
Observation Sheet Monday, 28 February 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)
- 8
- Number of spots (f)
- 30
- Relative number (R)
- 110
- Observer
- TA
- Reading
- all checks consistent
- File
- 20000228.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HH – 3 | 22 | 58W | 17 | 60W | 7 | |
| 2 | DAO – 4 | 19 | 36W | 355 | 38W | 8 | |
| 3 | HA – 4 | 11 | 14W | 333 | 16W | ~2.5 | |
| 4 | HA – 2 | 36 | 14E | 305 | 12E | 2 | |
| 5 | EAC – 3 | 20 | 27E | 292 | 25E | 17 | |
| 6 | CAO – 2 | -14 | 29W | 348 | 31W | 4.5 | |
| 7 | EKC – 4 | -17 | 10W | 329 | 12W | ~11 | |
| 8 | EKC – 8 | -16 | 43E | 276 | 41E | 12 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.