Daily Sunspot Evaluation
Observation Sheet Wednesday, 28 March 1990
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)
- 82
- Relative number (R)
- 152
- Observer
- HE
- Reading
- all checks consistent
- File
- 19900328.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | BXI – 7 | 23 | 60W | 334 | 63W | 9.5 | 129 |
| 2 | CAO – 2 | 25 | 34E | 240 | 31E | 15.5 | 136 |
| 3 | FKC – 33 | -14 | 62W | 336 | 65W | 18 | 123 |
| 4 | CKI – 14 | -31 | 50W | 324 | 53W | 12 | 122 |
| 5 | HA – 7 | -18 | 40W | 314 | 43W | 4 | 124 |
| 6 | CKO – 18 | -6 | 30W | 304 | 33W | 16.5 | 126 |
| 7 | HA – 1 | -12 | 46E | 228 | 43E | 2 | 139 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.