Daily Sunspot Evaluation
Observation Sheet Wednesday, 21 April 1976
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)
- 3
- Number of spots (f)
- 16
- Relative number (R)
- 46
- Observer
- GA
- Reading
- all checks consistent
- File
- 19760421.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 2 | -10 | 82E | 40 | 79E | ||
| 2 | B – 13 | -10 | 02W | 124 | 05W | ||
| 3 | J – 1 | 5 | 18W | 140 | 21W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.