Daily Sunspot Evaluation
Observation Sheet Sunday, 17 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)
- 5
- Number of spots (f)
- 79
- Relative number (R)
- 129
- Observer
- TA
- Reading
- all checks consistent
- File
- 19990117.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HS – 1 | 10 | 15W | 306 | 19W | 1.5 | |
| 2 | DAO – 6 | 24 | 06W | 297 | 08W | ~4 | |
| 3 | EAC – 39 | 19 | 25E | 266 | 23E | 13.5 | |
| 4 | BXO – 2 | -35 | 67W | 358 | 69W | 4 | |
| 5 | EAI – 31 | -25 | 24E | 267 | 22E | ~15 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.