Daily Sunspot Evaluation
Observation Sheet Saturday, 12 April 1980
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)
- 120
- Relative number (R)
- 210
- Observer
- TÖ
- Reading
- counts consistent, some coordinates doubtful
- File
- 19800412.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AXX – 3 | 21 | 61E | 335 | 60E | 3 | |
| 2 | AXX – 1 | 16 | 45E | 331 ⚠ | 64E | ||
| 3 | FKI – 13 | 13 | 67W | 105 | 70W | 15 | |
| 4 | FKI – 29 | 24 | 51W | 87 | 52W | 21 | |
| 5 | AXX – 1 | 10 | 33E | 3 | 32E | ||
| 6 | HEX – 10 | -19 | 02W | 38 | 03W | 4.5 | |
| 7 | HEX – 3 | -29 | 09E | 27 | 08E | 4.5 | |
| 8 | FKI – 31 | -32 | 21E | 15 | 20E | 12 | |
| 9 | FKI – 29 | -7 | 23E | 13 | 22E | 12 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.