Daily Sunspot Evaluation
Observation Sheet Tuesday, 12 June 1973
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)
- 39
- Relative number (R)
- 99
- Observer
- HM
- Reading
- all checks consistent
- File
- 19730612.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 11 | 15 | 11°E | 209 | 106 | ||
| 2 | H – 6 | 12 | 71°E | 143 | 111 | ||
| 3 | J – 2 | -16 | 11°E | 209 | 108 | ||
| 4 | D – 16 | 13 | 45°W | 265 | 104 | ||
| 5 | A – 2 | 15 | 33°W | 259 | 111 | ||
| 6 | A – 2 | 16 | 11°W | 231 | 112 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.