Daily Sunspot Evaluation
Observation Sheet Saturday, 23 March 1991
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)
- 119
- Relative number (R)
- 229
- Observer
- HE
- Reading
- all checks consistent
- File
- 19910323.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AR – 3 | 13 | 67W | 268 | 69W | 3 | 130 |
| 2 | AX – 2 | 12 | 23E | 178 | 21E | 3.5 | 131 |
| 3 | HA – 1 | -24 | 74W | 275 | 76W | 2 | 119 |
| 4 | HA – 5 | -2 | 28W | 229 | 30W | 4 | 222 |
| 5 | BRI – 6 | -13 | 18W | 219 | 20W | 7.5 | 123 |
| 6 | AX – 1 | -10 | 02W | 203 | 04W | - | 132 |
| 7 | AX – 1 | -14 | 02W | 203 | 04W | - | 133 |
| 8 | CSI – 9 | -13 | 07E | 194 | 05E | 5.5 | 126 |
| 9 | FKC – 65 | -25 | 15E | 186 | 13E | 20 | 127 |
| 10 | AR – 1 | -20 | 43E | 158 | 41E | 0.5 | 128 |
| 11 | EAC – 25 | -14 | 63E | 138 | 61E | 15 | 129 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.