Daily Sunspot Evaluation
Observation Sheet Friday, 1 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)
- 5
- Number of spots (f)
- 36
- Relative number (R)
- 86
- Observer
- MA
- Reading
- all checks consistent
- File
- 19710101.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 22 | 26E | 99 | |||
| 2 | G – 5 | 4 | 38E | 87 | |||
| 3 | D – 13 | -15 | 60W | 185 | |||
| 4 | G – 5 | 10 | 39W | 164 | |||
| 5 | D – 12 | 13 | 31W | 156 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.