Daily Sunspot Evaluation
Observation Sheet Saturday, 18 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)
- 11
- Number of spots (f)
- 140
- Relative number (R)
- 250
- Observer
- YK
- Reading
- all checks consistent
- File
- 19890318.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | FKC – 34 | 38 | 69W | 252 | 72W | 240 | |
| 2 | AX – 2 | 14 | 31W | 214 | 34W | 0.25 | |
| 3 | BXE – 21 | 18 | 23W | 206 | 26W | 9.0 | |
| 4 | AX – 3 | 23 | 18W | 201 | 21W | 3.0 | |
| 5 | BRO – 8 | 32 | 13E | 170 | 10E | 7.5 | |
| 6 | HK – 30 | 18 | 47E | 136 | 44E | 5.0 | |
| 7 | CKE – 8 | 13 | 61E | 122 | 58E | 13.0 | |
| 8 | HK – 5 | -16 | 62W | 245 | 65W | 4.0 | |
| 9 | AX – 1 | -18 | 39W | 222 | 42W | - | |
| 10 | HS – 25 | -14 | 07E | 176 | 04E | 7.25 | |
| 11 | BXE – 3 | -12 | 61E | 122 | 58E | 4.5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.