Daily Sunspot Evaluation
Observation Sheet Tuesday, 9 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)
- 7
- Number of spots (f)
- 33
- Relative number (R)
- 103
- Observer
- ED
- Reading
- all checks consistent
- File
- 19730109.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 13 | 61E | 30 | 6 | ||
| 2 | A – 1 | -16 | 73E | 18 | 8 | ||
| 3 | J – 2 | -18 | 29E | 62 | 9 | ||
| 4 | A – 2 | -11 | 45W | 136 | 10 | ||
| 5 | H – 5 | 9 | 55W | 146 | 1 | ||
| 6 | C – 5 | 12 | 30W | 121 | 4 | ||
| 7 | H – 17 | 14 | 20W | 111 | 3 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.