Daily Sunspot Evaluation
Observation Sheet Sunday, 9 January 1972
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)
- 13
- Relative number (R)
- 63
- Observer
- HM
- Reading
- all checks consistent
- File
- 19720109.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 6 | -8 | 52E | 190 | |||
| 2 | B – 3 | -10 | 59E | 183 | |||
| 3 | J – 2 | -23 | 04W | 246 | |||
| 4 | A – 1 | 8 | 77W | 319 | |||
| 5 | A – 1 | 17 | 37W | 279 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.