Daily Sunspot Evaluation
Observation Sheet Monday, 17 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)
- 7
- Number of spots (f)
- 52
- Relative number (R)
- 122
- Observer
- TÖ0
- Reading
- all checks consistent
- File
- 19890717.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CSO – 3 | 12 | 03W | 25 | 04W | 4.5 | |
| 2 | CAO – 27 | 27 | 02E | 20 | 01E | 12 | |
| 3 | EXO – 4 | 18 | 59E | 323 | 58E | 6 | |
| 4 | HH – 3 | -19 | 56W | 78 | 57W | 4 | |
| 5 | AK – 4 | -5 | 23E | 359 | 22E | 1 | |
| 6 | CAO – 2 | -13 | 62E | 319 | 62E | 6 | |
| 7 | CKO – 9 | -23 | 72E | 310 | 71E | 14 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.