Daily Sunspot Evaluation
Observation Sheet Thursday, 28 August 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)
- 88
- Relative number (R)
- 168
- Observer
- SM
- Reading
- all checks consistent
- File
- 19690828.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 14 | 10 | 55°E | 71 | |||
| 2 | A – 1 | 8 | 76°E | 50 | |||
| 3 | D – 23 | 5 | 47°E | 79 | |||
| 4 | J – 3 | 2 | 67°E | 59 | |||
| 5 | C – 12 | -10 | 26°E | 100 | |||
| 6 | A – 2 | -21 | 19°E | 107 | |||
| 7 | B – 3 | -8 | 04°W | 130 | |||
| 8 | E – 30 | 10 | 02°W | 128 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.