Daily Sunspot Evaluation
Observation Sheet Tuesday, 12 April 1983
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)
- 6
- Number of spots (f)
- 37
- Relative number (R)
- 97
- Observer
- TÖ
- Reading
- counts consistent, some coordinates doubtful
- File
- 19830412.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CRO – 3 | -9 | 60W | 45 | 63W | 5 | 82 |
| 2 | CAI – 22 | -16 | 12W | 357 | 15W | 8 | 84 |
| 3 | HRX – 1 | -8 | 04E | 34 ⚠ | 01E | 0.5 | 85 |
| 4 | BDI – 7 | -13 | 06E | 339 | 03E | 4 | 87 |
| 5 | CAI – 3 | -7 | 57E | 288 | 54E | 4.5 | 88 |
| 6 | HAX – 1 | -9 | 59E | 286 | 56E | 1 | 89 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.