Daily Sunspot Evaluation
Observation Sheet Tuesday, 23 July 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)
- 5
- Number of spots (f)
- 70
- Relative number (R)
- 120
- Observer
- AT
- Reading
- all checks consistent
- File
- 19680723.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 7 | 8 | 10E | 9 | |||
| 2 | D – 51 | -18 | 10E | 9 | |||
| 3 | J – 1 | -17 | 17W | 36 | |||
| 4 | C – 10 | -18 | 30W | 49 | |||
| 5 | J – 1 | 12 | 73W | 92 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.