Daily Sunspot Evaluation
Observation Sheet Thursday, 27 April 1978
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)
- 6
- Number of spots (f)
- 81
- Relative number (R)
- 141
- Observer
- GT
- Reading
- all checks consistent
- File
- 19780427.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 32 | 24 | 53E | 75 | 50E | ||
| 2 | ? – 3 | 24 | 74E | 54 | 71E | ||
| 3 | D – 6 | -32 | 68W | 196 | 71W | ||
| 4 | D – 18 | 13 | 56W | 184 | 59W | ||
| 5 | D – 16 | 20 | 59W | 187 | 62W | ||
| 6 | C – 6 | 28 | 07W | 135 | 10W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.