Daily Sunspot Evaluation
Observation Sheet Saturday, 13 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)
- 10
- Number of spots (f)
- 79
- Relative number (R)
- 179
- Observer
- YK
- Reading
- all checks consistent
- File
- 19990213.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | GRE – 18 | 24 | 02W | 294 | 02W | 11 | |
| 2 | HS – 1 | 18 | 15E | 277 | 15E | 1.5 | |
| 3 | EKI – 26 | 14 | 17E | 275 | 17E | 12 | |
| 4 | DAI – 12 | 21 | 29E | 263 | 29E | 5.5 | |
| 5 | HS – 2 | 20 | 59E | 233 | 59E | 2.5 | |
| 6 | ? – 3 | 21 | 70E | 222 | 70E | - | |
| 7 | BXO – 3 | -30 | 55W | 347 | 55W | ~3 | |
| 8 | DHI – 10 | -22 | 21E | 271 | 21E | 8.5 | okel |
| 9 | HR – 3 | -16 | 36E | 256 | 36E | 1 | |
| 10 | HS – 1 | -15 | 52E | 240 | 52E | 1.5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.