Daily Sunspot Evaluation
Observation Sheet Friday, 9 April 1993
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)
- 109
- Relative number (R)
- 159
- Observer
- TA
- Reading
- all checks consistent
- File
- 19930409.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DRS – 12 | 4 | 26W | 76 | 29W | 4.5 | 90 |
| 2 | BXS – 7 | 16 | 16W | 66 | 19W | 2.5 | 85 |
| 3 | HA – 7 | -4 | 62W | 112 | 65W | 4 | 82 |
| 4 | DAS – 19 | -9 | 56W | 106 | 59W | 8.5 | 88 |
| 5 | EKC – 64 | -11 | 30W | 80 | 33W | 14.5 | 86 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.