Daily Sunspot Evaluation
Observation Sheet Wednesday, 21 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)
- 11
- Number of spots (f)
- 100
- Relative number (R)
- 210
- Observer
- HE
- Reading
- all checks consistent
- File
- 19900321.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 4 | 32 | 75W | 80 | 77W | 9 | 108 |
| 2 | BAG – 4 | 4 | 22W | 27 | 24W | 3 | 113 |
| 3 | CAI – 19 | 18 | 03E | 2 | 01E | 7.5 | 117 |
| 4 | AX – 2 | 15 | 46E | 319 | 44E | 1.5 | 125 |
| 5 | AX – 1 | -20 | 13W | 18 | 15W | - | 115 |
| 6 | AHC – 29 | -34 | 09W | 14 | 11W | 21 | 114 |
| 7 | AR – 1 | -11 | 19E | 346 | 17E | 1 | 119 |
| 8 | CAI – 11 | -13 | 34E | 331 | 32E | 4.5 | 123 |
| 9 | FAO – 18 | -32 | 41E | 324 | 39E | 17 | 122 |
| 10 | CAO – 6 | -17 | 49E | 316 | 47E | 8.5 | 124 |
| 11 | EAO – 5 | -7 | 63E | 302 | 61E | 13.5 | 126 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.