Daily Sunspot Evaluation
Observation Sheet Sunday, 17 March 1968
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)
- 42
- Relative number (R)
- 92
- Observer
- LT
- Reading
- all checks consistent
- File
- 19680317.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | G – 25 | 15 | 0 | 271 | |||
| 2 | H – 12 | 31 | 25E | 246 | |||
| 3 | A – 1 | -16 | 33E | 238 | |||
| 4 | J – 2 | -17 | 9E | 262 | |||
| 5 | A – 2 | -14 | 46W | 317 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.