Daily Sunspot Evaluation
Observation Sheet Tuesday, 21 June 1966
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)
- 4
- Number of spots (f)
- 12
- Relative number (R)
- 52
- Observer
- LT
- Reading
- all checks consistent
- File
- 19660621.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 25 | 25°E | 346 | |||
| 2 | A – 6 | 27 | 37°E | 334 | |||
| 3 | A – 3 | 18 | 49°W | 60 | |||
| 4 | J – 2 | 21 | 43°W | 54 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.