Daily Sunspot Evaluation
Observation Sheet Thursday, 13 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)
- 9
- Number of spots (f)
- 42
- Relative number (R)
- 132
- Observer
- TÖ0
- Reading
- all checks consistent
- File
- 19890713.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HS – 2 | 25 | 67W | 143 | 69W | 2 | 348 |
| 2 | AX – 3 | 12 | 38W | 114 | 40W | 1 | 349 |
| 3 | BRO – 2 | 21 | 25W | 101 | 21W | 0.5 | 349 |
| 4 | HS – 1 | 11 | 50E | 26 | 48E | 2 | 349 |
| 5 | EKI – 15 | 27 | 54E | 22 | 52E | 12 | 349 |
| 6 | BRI – 10 | -10 | 25W | 101 | 27W | 13 | 349 |
| 7 | BRO – 3 | -19 | 17W | 93 | 19W | 3 | 349 |
| 8 | HS – 2 | -12 | 08W | 84 | 10W | 4 | 349 |
| 9 | HT – 4 | -17 | 01W | 77 | 03W | 2 | 349 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.