Daily Sunspot Evaluation
Observation Sheet Sunday, 18 September 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)
- 5
- Number of spots (f)
- 92
- Relative number (R)
- 142
- Observer
- HıE
- Reading
- all checks consistent
- File
- 19660918.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 45 | 21 | 44E | 230 | |||
| 2 | H – 31 | 5 | 18E | 256 | |||
| 3 | D – 3 | 6 | 39W | 313 | |||
| 4 | ? – 12 | 21 | 72W | 346 | |||
| 5 | ? – 1 | 30 | 70W | 344 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.