Daily Sunspot Evaluation
Observation Sheet Friday, 22 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)
- 10
- Number of spots (f)
- 81
- Relative number (R)
- 181
- Observer
- HÇ0
- Reading
- all checks consistent
- File
- 19910322.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AX – 2 | 22 | 47W | 262 | 60W | 0.5 | 124 |
| 2 | HK – 4 | -8 | 74W | 289 | 77W | 6 | 117 |
| 3 | HA – 1 | -24 | 59W | 274 | 62W | 2 | 115 |
| 4 | HA – 6 | -2 | 13W | 228 | 16W | 4.5 | 122 |
| 5 | AX – 1 | -12 | 13W | 228 | 16W | - | 125 |
| 6 | CAI – 8 | -13 | 06W | 221 | 09W | 13 | 123 |
| 7 | CAI – 5 | -12 | 21E | 194 | 18E | 5 | 126 |
| 8 | FKC – 46 | -25 | 29E | 186 | 26E | 20 | 127 |
| 9 | AR – 1 | -19 | 56E | 159 | 53E | 1 | 128 |
| 10 | ? – 7 | -13 | 75E | 140 | 72E | 16 | 129 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.