Daily Sunspot Evaluation
Observation Sheet Sunday, 17 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)
- 5
- Number of spots (f)
- 25
- Relative number (R)
- 75
- Observer
- LT
- Reading
- counts consistent, some coordinates doubtful
- File
- 19670917.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 3 | 16 | 24E | 126 | |||
| 2 | C – 12 | -24 | 29E | 131 ⚠ | |||
| 3 | J – 2 | -30 | 3E | 147 | |||
| 4 | A – 2 | -14 | 3W | 159 ⚠ | |||
| 5 | H – 6 | 12 | 40W | 150 ⚠ |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.