Daily Sunspot Evaluation
Observation Sheet Sunday, 17 January 1960
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)
- 11
- Number of spots (f)
- 56
- Relative number (R)
- 166
- Observer
- AB
- Reading
- all checks consistent
- File
- 19600117.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 5 | 29 | 58E | ||||
| 2 | J – 1 | 16 | 38E | ||||
| 3 | C – 16 | 6 | 25E | ||||
| 4 | ? – 4 | 14 | 75E | ||||
| 5 | H – 9 | 9 | 56E | ||||
| 6 | J – 1 | -18 | 13E | ||||
| 7 | C – 4 | -9 | 20W | ||||
| 8 | C – 13 | -13 | 55W | ||||
| 9 | H – 1 | 18 | 73W | ||||
| 10 | A – 1 | 25 | 8W | ||||
| 11 | A – 1 | 24 | 1W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.