Daily Sunspot Evaluation
Observation Sheet Monday, 21 January 1957
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)
- 12
- Number of spots (f)
- 76
- Relative number (R)
- 196
- Observer
- KA
- Reading
- all checks consistent
- File
- 19570121.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | H – 12 | |||
| 2 | J – 5 | |||
| 3 | A – 1 | |||
| 4 | D – 14 | |||
| 5 | B – 9 | |||
| 6 | ? – 1 | |||
| 7 | ? – 2 | |||
| 8 | E – 19 | |||
| 9 | H – 8 | |||
| 10 | B – 2 | |||
| 11 | B – 2 | |||
| 12 | J – 1 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.