Daily Sunspot Evaluation
Observation Sheet Sunday, 21 May 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)
- 176
- Relative number (R)
- 256
- Observer
- SB0
- Reading
- all checks consistent
- File
- 20000521.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CAI – 11 | 19 | 27W | 332 | 30W | 5 | |
| 2 | DKC – 15 | 11 | 12W | 317 | 15W | 6.5 | |
| 3 | FHC – 47 | 19 | 00 | 305 | 03W | 16.5 | |
| 4 | CAI – 19 | 21 | 38E | 267 | 35E | 8 | |
| 5 | HK – 2 | 18 | 50E | 255 | 47E | 13 | |
| 6 | EKC – 38 | -23 | 40W | 345 | 43W | 10 | |
| 7 | EKC – 37 | -13 | 25W | 330 | 28W | 11 | |
| 8 | CSO – 7 | -15 | 40E | 265 | 37E | 5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.