Daily Sunspot Evaluation
Observation Sheet Saturday, 27 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)
- 21
- Relative number (R)
- 91
- Observer
- AT
- Reading
- counts consistent, some coordinates doubtful
- File
- 19680427.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 19 | 27E | 13 ⚠ | |||
| 2 | J – 1 | -25 | 53E | 37 | |||
| 3 | J – 1 | -24 | 21E | 69 | |||
| 4 | J – 2 | -25 | 63W | 153 | |||
| 5 | C – 9 | 8 | 57W | 147 | |||
| 6 | C – 5 | 17 | 49W | 139 | |||
| 7 | A – 2 | 16 | 25W | 115 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.