Daily Sunspot Evaluation
Observation Sheet Tuesday, 21 March 1989
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)
- 88
- Relative number (R)
- 188
- Observer
- SG0
- Reading
- all checks consistent
- File
- 19890321.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AX – 1 | 17 | 65W | 208 | 68W | - | 149 |
| 2 | CAO – 3 | 24 | 60W | 203 | 63W | 5.0 | 144 |
| 3 | DKC – 29 | 18 | 05E | 138 | 02E | 8.0 | 145 |
| 4 | CAI – 17 | 12 | 17E | 126 | 14E | 10.0 | 145 |
| 5 | AR – 1 | 16 | 29E | 114 | 26E | 0.5 | 146 |
| 6 | ? – 1 | -18 | 81W | 224 | 84W | 3.0 | 142 |
| 7 | CSI – 11 | -15 | 33W | 176 | 36W | 7.5 | 144 |
| 8 | OKI – 13 | -19 | 19W | 162 | 22W | 6.0 | 146 |
| 9 | BRO – 4 | -21 | 07W | 150 | 10W | 3.5 | 148 |
| 10 | ? – 8 | -27 | 76E | 67 | 73E | 16.0 | 149 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.