Daily Sunspot Evaluation
Observation Sheet Wednesday, 20 September 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)
- 7
- Number of spots (f)
- 49
- Relative number (R)
- 119
- Observer
- LT
- Reading
- counts consistent, some coordinates doubtful
- File
- 19670920.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 24 | 17E | 93 | |||
| 2 | A – 3 | 24 | 26E | 84 | |||
| 3 | C – 5 | 17 | 29E | 90 ⚠ | |||
| 4 | E – 33 | -24 | 11W | 121 | |||
| 5 | J – 1 | -30 | 36W | 146 | |||
| 6 | B – 5 | 10 | 36W | 146 | |||
| 7 | ? – 1 | 11 | 82W | 192 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.