Daily Sunspot Evaluation
Observation Sheet Sunday, 10 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)
- 8
- Number of spots (f)
- 122
- Relative number (R)
- 202
- Observer
- YK
- Reading
- all checks consistent
- File
- 19910310.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AX – 2 | 19 | 25W | 35 | 24W | 1 | 111 |
| 2 | AX – 2 | 17 | 04W | 14 | 03W | 0.5 | 112 |
| 3 | CSO – 3 | 16 | 07E | 3 | 08E | 7.5 | 104 |
| 4 | BXO – 3 | -33 | 11W | 21 | 10W | 6 | 115 |
| 5 | DAC – 28 | -8 | 07E | 5 | 08E | 11 | 108 |
| 6 | FKC – 82 | -25 | 29E | 341 | 30E | 26 | 105 |
| 7 | HS – 1 | -12 | 34E | 336 | 35E | 2 | 116 |
| 8 | ? – 1 | -9 | 84E | 286 | 85E | 4 | 117 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.