Daily Sunspot Evaluation
Observation Sheet Tuesday, 18 May 1965
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)
- 50
- Relative number (R)
- 90
- Observer
- SK
- Reading
- all checks consistent
- File
- 19650518.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | F – 31 | 22 | +38E | 200 | |||
| 2 | ? – 9 | 24 | 63E | 175 | |||
| 3 | C – 4 | 23 | 40W | 278 | |||
| 4 | B – 6 | 20 | 22W | 260 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.