Daily Sunspot Evaluation
Observation Sheet Tuesday, 28 October 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)
- 7
- Number of spots (f)
- 53
- Relative number (R)
- 123
- Observer
- AT
- Reading
- counts consistent, some coordinates doubtful
- File
- 19691028.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 2 | 17 | 57E | 340 | |||
| 2 | J – 1 | -14 | 71E | 328 | |||
| 3 | J – 2 | -12 | 21E | 46 ⚠ | |||
| 4 | J – 1 | -11 | 25W | 63 | |||
| 5 | J – 1 | 5 | 5W | 88 ⚠ | |||
| 6 | E – 40 | 11 | 29W | 66 | |||
| 7 | H – 6 | 10 | 53W | 90 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.