Daily Sunspot Evaluation
Observation Sheet Monday, 12 March 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)
- 5
- Number of spots (f)
- 76
- Relative number (R)
- 126
- Observer
- HM
- Reading
- all checks consistent
- File
- 19730312.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 2 | 7 | 48E | 308 | 47 | ||
| 2 | E – 24 | -7 | 15E | 341 | 45 | ||
| 3 | D – 21 | -12 | 27E | 329 | 44 | ||
| 4 | C – 5 | -17 | 23W | 19 | 41 | ||
| 5 | D – 24 | 13 | 30W | 26 | 42 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.