Daily Sunspot Evaluation
Observation Sheet Thursday, 28 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)
- 10
- Number of spots (f)
- 43
- Relative number (R)
- 143
- Observer
- DK
- Reading
- all checks consistent
- File
- 19680328.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 11 | 08E | 117 | |||
| 2 | E – 8 | 17 | 30E | 95 | |||
| 3 | A – 1 | 22 | 35E | 90 | |||
| 4 | D – 4 | -14 | 40E | 85 | |||
| 5 | A – 2 | -13 | 57E | 68 | |||
| 6 | D – 7 | -22 | 50E | 75 | |||
| 7 | B – 4 | -15 | 16E | 109 | |||
| 8 | A – 3 | -24 | 77W | 202 | |||
| 9 | D – 5 | -13 | 49W | 174 | |||
| 10 | E – 8 | 12 | 07W | 132 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.