Daily Sunspot Evaluation
Observation Sheet Thursday, 21 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)
- 27
- Relative number (R)
- 77
- Observer
- DK
- Reading
- all checks consistent
- File
- 19680321.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 4 | 11 | 07E | 211 | |||
| 2 | D – 7 | -13 | 45E | 173 | |||
| 3 | B – 5 | -24 | 57E | 161 | |||
| 4 | G – 3 | 16 | 45W | 263 | |||
| 5 | H – 8 | 34 | 25W | 243 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.