Daily Sunspot Evaluation
Observation Sheet Sunday, 23 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)
- 15
- Relative number (R)
- 75
- Observer
- SK
- Reading
- all checks consistent
- File
- 19720723.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 5 | 57E | 117 | |||
| 2 | A – 1 | -3 | 72E | 102 | |||
| 3 | A – 2 | -8 | 05E | 169 | |||
| 4 | A – 3 | -9 | 55W | 229 | |||
| 5 | H – 2 | -9 | 67W | 241 | |||
| 6 | C – 6 | 14 | 61W | 235 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.