Daily Sunspot Evaluation
Observation Sheet Tuesday, 5 January 1971
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)
- 20
- Relative number (R)
- 60
- Observer
- FA
- Reading
- all checks consistent
- File
- 19710105.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 12 | 68E | 5 | |||
| 2 | E – 14 | -5 | 69E | 4 | |||
| 3 | H – 3 | 3 | 16W | 89 | |||
| 4 | J – 2 | 21 | 25W | 98 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.