Daily Sunspot Evaluation
Observation Sheet Tuesday, 2 February 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)
- 6
- Number of spots (f)
- 113
- Relative number (R)
- 173
- Observer
- LT
- Reading
- all checks consistent
- File
- 19710202.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 7 | -7 | 50E | 11 | |||
| 2 | A – 1 | -21 | 34E | 27 | |||
| 3 | A – 3 | -15 | 29W | 90 | |||
| 4 | C – 14 | -12 | 39W | 100 | |||
| 5 | D – 13 | 9 | 31W | 92 | |||
| 6 | F – 75 | 7 | 05W | 66 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.