Daily Sunspot Evaluation
Observation Sheet Tuesday, 20 August 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)
- 7
- Number of spots (f)
- 79
- Relative number (R)
- 149
- Observer
- LT
- Reading
- all checks consistent
- File
- 19680820.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 27 | 18E | 348 | |||
| 2 | J – 1 | 7 | 75E | 291 | |||
| 3 | C – 6 | -19 | 55E | 311 | |||
| 4 | E – 44 | -11 | 7W | 13 | |||
| 5 | G – 22 | -15 | 30W | 36 | |||
| 6 | J – 1 | -17 | 52W | 58 | |||
| 7 | H – 4 | 8 | 10W | 16 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.