Daily Sunspot Evaluation
Observation Sheet Wednesday, 27 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)
- 7
- Number of spots (f)
- 42
- Relative number (R)
- 112
- Observer
- MA
- Reading
- all checks consistent
- File
- 19710127.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 5 | 3 | 26E | 117 | |||
| 2 | ? – 2 | 6 | 71E | 72 | |||
| 3 | E – 18 | -13 | 42E | 101 | |||
| 4 | E – 14 | -13 | 49W | 192 | |||
| 5 | J – 1 | 8 | 52W | 195 | |||
| 6 | ? – 1 | 17 | 75W | 218 | |||
| 7 | J – 1 | 18 | 64W | 207 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.