Daily Sunspot Evaluation
Observation Sheet Tuesday, 23 April 1968
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)
- 3
- Number of spots (f)
- 7
- Relative number (R)
- 37
- Observer
- AT
- Reading
- all checks consistent
- File
- 19680423.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 5 | 8 | 35E | 108 | |||
| 2 | ? – 1 | -25 | 73E | 70 | |||
| 3 | J – 1 | 32 | 74W | 217 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.