Daily Sunspot Evaluation
Observation Sheet Sunday, 20 August 1967
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)
- 12
- Number of spots (f)
- 87
- Relative number (R)
- 207
- Observer
- LT
- Reading
- all checks consistent
- File
- 19670820.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 2 | 30 | 74E | 85 | |||
| 2 | C – 5 | 27 | 65E | 94 | |||
| 3 | ? – 18 | 23 | 72E | 87 | |||
| 4 | J – 2 | 25 | 62E | 97 | |||
| 5 | ? – 1 | 17 | 88E | 71 | |||
| 6 | ? – 2 | 12 | 82E | 77 | |||
| 7 | J – 4 | 13 | 65E | 94 | |||
| 8 | A – 2 | -32 | 49E | 110 | |||
| 9 | H – 15 | -31 | 7W | 166 | |||
| 10 | E – 30 | 9 | 46W | 205 | |||
| 11 | ? – 3 | 12 | 74W | 233 | |||
| 12 | G – 3 | 16 | 63W | 222 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.