Daily Sunspot Evaluation
Observation Sheet Friday, 17 January 1969
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)
- 7
- Number of spots (f)
- 43
- Relative number (R)
- 113
- Observer
- AT
- Reading
- all checks consistent
- File
- 19690117.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 17 | 04E | 186 | |||
| 2 | D – 13 | 23 | 60E | 130 | |||
| 3 | E – 10 | 14 | 45E | 145 | |||
| 4 | D – 3 | -12 | 56E | 134 | |||
| 5 | J – 1 | -14 | 13E | 177 | |||
| 6 | E – 8 | -14 | 65W | 255 | |||
| 7 | D – 7 | -12 | 69W | 259 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.