Daily Sunspot Evaluation
Observation Sheet Friday, 23 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)
- 14
- Number of spots (f)
- 154
- Relative number (R)
- 294
- Observer
- YK
- Reading
- all checks consistent
- File
- 19900323.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | BXI – 6 | 18 | 23W | 2 | 26W | 7° | 117 |
| 2 | AX – 1 | 27 | 06E | 333 | 03E | - | 128 |
| 3 | BXO – 5 | 23 | 09E | 330 | 06E | 3.75 | 123 |
| 4 | AX – 1 | 20 | 67E | 272 | 64E | - | 130 |
| 5 | AX – 3 | -16 | 61W | 40 | 64W | 2.25 | 131 |
| 6 | AX – 2 | -11 | 57W | 36 | 60W | 3 | 132 |
| 7 | FAC – 36 | -33 | 34W | 13 | 39W | 22 | 114 |
| 8 | AR – 1 | -10 | 07W | 346 | 10W | 0.25 | 119 |
| 9 | DAI – 28 | -13 | 06E | 333 | 03E | 11 | 123 |
| 10 | EAC – 37 | -32 | 18E | 321 | 15E | 13.5 | 122 |
| 11 | CAI – 7 | -16 | 23E | 316 | 20E | 4.75 | 124 |
| 12 | AX – 1 | -16 | 30E | 309 | 22E | - | 133 |
| 13 | AR – 3 | -20 | 35E | 304 | 32E | 2 | 134 |
| 14 | FKO – 23 | -7 | 36E | 303 | 33E | 15 | 126 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.