Daily Sunspot Evaluation
Observation Sheet Saturday, 20 February 1999
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)
- 9
- Number of spots (f)
- 37
- Relative number (R)
- 127
- Observer
- HE
- Reading
- all checks consistent
- File
- 19990220.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 2 | 13 | 80W | 283 | 83W | ||
| 2 | CAO – 3 | 18 | 70W | 273 | 73W | 9 | |
| 3 | HA – 6 | 21 | 57W | 260 | 60W | 3.5 | |
| 4 | DRO – 5 | 35 | 57W | 260 | 60W | 7 | |
| 5 | HR – 3 | 18 | 30W | 233 | 33W | 2.5 | |
| 6 | HA – 3 | 16 | 26E | 177 | 23E | 2.5 | |
| 7 | DKC – 12 | -22 | 66W | 269 | 69W | 9 | |
| 8 | HA – 2 | -18 | 37W | 240 | 40W | 1 | |
| 9 | AX – 1 | -22 | 15E | 188 | 12E |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.