Daily Sunspot Evaluation
Observation Sheet Tuesday, 30 April 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)
- 7
- Number of spots (f)
- 35
- Relative number (R)
- 105
- Observer
- AT
- Reading
- all checks consistent
- File
- 19680430.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 12 | 16 | 19E | 20 | |||
| 2 | J – 1 | 18 | 39E | 359 | |||
| 3 | ? – 9 | 19 | 76E | 322 | |||
| 4 | ? – 1 | 9 | 79E | 319 | |||
| 5 | C – 6 | -16 | 17E | 21 | |||
| 6 | J – 4 | -24 | 17W | 55 | |||
| 7 | A – 2 | 22 | 5W | 43 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.