Daily Sunspot Evaluation
Observation Sheet Friday, 19 January 1973
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)
- 4
- Number of spots (f)
- 11
- Relative number (R)
- 51
- Observer
- ED
- Reading
- all checks consistent
- File
- 19730119.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 6 | 11 | 02E | 316 | 11 | ||
| 2 | B – 2 | -12 | 08W | 326 | 14 | ||
| 3 | B – 2 | -18 | 51W | 9 | 13 | ||
| 4 | A – 1 | 2 | 04W | 322 | 12 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.