Daily Sunspot Evaluation
Observation Sheet Saturday, 27 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)
- 54
- Relative number (R)
- 114
- Observer
- MA
- Reading
- all checks consistent
- File
- 19710227.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 26 | 48E | 47 | |||
| 2 | H – 23 | 8 | 23E | 72 | |||
| 3 | G – 4 | 9 | 64E | 31 | |||
| 4 | D – 15 | -18 | 43W | 138 | |||
| 5 | J – 1 | -9 | 12W | 107 | |||
| 6 | H – 10 | -8 | 31W | 126 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.