Daily Sunspot Evaluation
Observation Sheet Tuesday, 4 April 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)
- 78
- Relative number (R)
- 178
- Observer
- SG0
- Reading
- all checks consistent
- File
- 19890404.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 2 | 22 | 76W | 34 | 79W | 2 | |
| 2 | AX – 2 | 24 | 71W | 29 | 74W | 1 | |
| 3 | AX – 1 | 38 | 62W | 20 | 65W | - | |
| 4 | AX – 1 | 38 | 13E | 305 | 10E | - | |
| 5 | FKC – 53 | -18 | 11E | 307 | 08E | 19 | |
| 6 | CAO – 10 | -12 | 25E | 293 | 22E | 5.5 | |
| 7 | AX – 2 | -23 | 40E | 278 | 37E | 0.5 | |
| 8 | BRO – 4 | -22 | 49E | 269 | 46E | 6 | |
| 9 | HS – 2 | -15 | 69E | 249 | 66E | 4 | |
| 10 | AX – 1 | -16 | 75E | 243 | 72E | - |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.