Daily Sunspot Evaluation
Observation Sheet Tuesday, 23 September 1969
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)
- 8
- Number of spots (f)
- 40
- Relative number (R)
- 120
- Observer
- SK
- Reading
- all checks consistent
- File
- 19690923.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 3 | 13 | 18E | 124 | |||
| 2 | ? – 1 | 10 | 78E | 64 | |||
| 3 | ? – 2 | 7 | 81E | 61 | |||
| 4 | H – 7 | 5 | 55E | 87 | |||
| 5 | B – 6 | 5 | 35E | 107 | |||
| 6 | J – 3 | -14 | 61E | 81 | |||
| 7 | C – 16 | 5 | 07W | 149 | |||
| 8 | ? – 2 | -4 | 76W | 218 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.