Daily Sunspot Evaluation
Observation Sheet Wednesday, 9 February 1972
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)
- 19
- Relative number (R)
- 69
- Observer
- FA
- Reading
- all checks consistent
- File
- 19720209.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 16 | 70E | 125 | |||
| 2 | C – 5 | 7 | 68E | 127 | |||
| 3 | C – 8 | -8 | 54E | 141 | |||
| 4 | A – 1 | -24 | 19W | 214 | |||
| 5 | B – 4 | -20 | 59W | 254 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.