Daily Sunspot Evaluation
Observation Sheet Thursday, 16 March 1961
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)
- 18
- Relative number (R)
- 68
- Observer
- KA
- Reading
- all checks consistent
- File
- 19610316.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 3 | 20 | 15E | ||||
| 2 | C – 5 | 14 | 42E | ||||
| 3 | D – 4 | -24 | 38E | ||||
| 4 | J – 1 | -6 | 28W | ||||
| 5 | B – 5 | 21 | 47W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.