Daily Sunspot Evaluation
Observation Sheet Saturday, 28 March 1981
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)
- 9
- Number of spots (f)
- 51
- Relative number (R)
- 141
- Observer
- TÖ
- Reading
- all checks consistent
- File
- 19810328.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | EKC – 19 | 13 | 50W | 144 | 49W | 14 | |
| 2 | CAO – 6 | 21 | 02E | 92 | 03E | 9 | |
| 3 | AXX – 1 | 11 | 04E | 90 | 05E | ||
| 4 | BXO – 2 | 17 | 55E | 39 | 56E | 7 | |
| 5 | ? – 4 | 26 | 70E | 24 | 71E | 8 | |
| 6 | HAX – 6 | -19 | 47W | 141 | 46W | 4.5 | |
| 7 | HKX – 5 | -45 | 07W | 101 | 06W | 6.5 | |
| 8 | CSO – 4 | -13 | 28E | 66 | 27E | 7.5 | |
| 9 | BXO – 4 | -14 | 40E | 54 | 39E | 3 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.