Daily Sunspot Evaluation
Observation Sheet Sunday, 23 July 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)
- 13
- Number of spots (f)
- 167
- Relative number (R)
- 297
- Observer
- HÇ
- Reading
- all checks consistent
- File
- 19890723.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | BAC – 4 | 13 | 13W | 315 | 14W | 4 | |
| 2 | EAC – 16 | 29 | 57W | 359 | 58W | 11.5 | |
| 3 | BAO – 9 | 20 | 19W | 321 | 20W | 8.5 | |
| 4 | BXO – 6 | 16 | 15W | 317 | 16W | 6 | |
| 5 | HH – 1 | 27 | 12E | 290 | 11E | 3 | |
| 6 | EAI – 18 | 25 | 24E | 278 | 23E | 11.5 | |
| 7 | DKC – 40 | -12 | 20W | 322 | 21W | 8 | |
| 8 | CAE – 17 | -32 | 14W | 316 | 15W | 9 | |
| 9 | DKC – 30 | -23 | 05W | 307 | 06W | 9 | |
| 10 | AA – 1 | -21 | 02E | 300 | 01E | - | |
| 11 | BRI – 12 | -19 | 14E | 288 | 13E | 5.5 | |
| 12 | AX – 1 | -24 | 16E | 286 | 15E | - | |
| 13 | ? – 12 | -19 | 68E | 234 | 67E | 5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.