Daily Sunspot Evaluation
Observation Sheet Wednesday, 13 January 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)
- 3
- Number of spots (f)
- 20
- Relative number (R)
- 50
- Observer
- SG0
- Reading
- all checks consistent
- File
- 19990113.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HS – 1 | 10 | 38E | 304 | 37E | 1.5 | |
| 2 | CRO – 9 | -19 | 04E | 338 | 03E | 6 | |
| 3 | CAI – 10 | -24 | 72E | 270 | 71E | 13 | 7-10 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.