Daily Sunspot Evaluation
Observation Sheet Monday, 18 July 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)
- 6
- Number of spots (f)
- 29
- Relative number (R)
- 89
- Observer
- LT
- Reading
- all checks consistent
- File
- 19660718.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 6 | 22 | 0° | 13 | |||
| 2 | H – 12 | 27 | 12°E | 1 | |||
| 3 | A – 1 | 34 | 69°E | 304 | |||
| 4 | G – 6 | -23 | 56°E | 317 | |||
| 5 | A – 2 | 10 | 60W | 73 | |||
| 6 | B – 2 | 23 | 38°W | 51 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.