Daily Sunspot Evaluation
Observation Sheet Friday, 22 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)
- 120
- Relative number (R)
- 190
- Observer
- HA
- Reading
- all checks consistent
- File
- 19710122.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 22 | 9 | 17E | 192 | |||
| 2 | J – 2 | 13 | 40E | 169 | |||
| 3 | J – 3 | 13 | 50E | 159 | |||
| 4 | E – 28 | -13 | 18E | 191 | |||
| 5 | F – 49 | 19 | 12W | 221 | |||
| 6 | A – 3 | 28 | 15W | 224 | |||
| 7 | H – 13 | 18 | 01W | 210 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.