Daily Sunspot Evaluation
Observation Sheet Saturday, 21 April 1984
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)
- 5
- Number of spots (f)
- 25
- Relative number (R)
- 75
- Observer
- HG
- Reading
- counts consistent, some coordinates doubtful
- File
- 19840421.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CAI – 4 | 5 | 32W | 151 ⚠ | 78W | 7 | 75 |
| 2 | DKO – 6 | 8 | 30W | 144 ⚠ | 71W | 7.5 | 72 |
| 3 | BXI – 8 | -15 | 05W | 69 ⚠ | 06W | 3 | 73 |
| 4 | CAI – 6 | -10 | 33E | 41 ⚠ | 32E | 5.5 | 74 |
| 5 | ? – 1 | 76 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.