Daily Sunspot Evaluation
Observation Sheet Saturday, 22 July 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)
- 6
- Number of spots (f)
- 53
- Relative number (R)
- 113
- Observer
- FA
- Reading
- all checks consistent
- File
- 19720722.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 4 | 71E | 117 | |||
| 2 | A – 2 | -21 | 18W | 206 | |||
| 3 | C – 19 | -10 | 40W | 228 | |||
| 4 | H – 11 | -9 | 52W | 240 | |||
| 5 | A – 6 | 9 | 57W | 245 | |||
| 6 | C – 14 | 14 | 46W | 234 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.