Daily Sunspot Evaluation
Observation Sheet Thursday, 6 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)
- 97
- Relative number (R)
- 197
- Observer
- TÖ0
- Reading
- all checks consistent
- File
- 19890406.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AX – 3 | 18 | 39W | 332 | 42W | - | 174 |
| 2 | AX – 3 | 8 | 26W | 319 | 29W | 2 | 175 |
| 3 | BXI – 4 | 30 | 20W | 313 | 23W | 3 | 176 |
| 4 | BRO – 9 | 16 | 09E | 284 | 06E | 6 | 177 |
| 5 | HA – 3 | 35 | 62E | 231 | 59E | 4 | 178 |
| 6 | FKC – 47 | -19 | 15W | 308 | 18W | 20 | 179 |
| 7 | CAI – 17 | -12 | 01W | 294 | 04W | 7 | 180 |
| 8 | BRI – 9 | -16 | 23E | 270 | 20E | 4 | 181 |
| 9 | AR – 1 | -18 | 40E | 253 | 37E | - | 182 |
| 10 | HA – 1 | -15 | 42E | 251 | 39E | 2 | 183 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.