Daily Sunspot Evaluation
Observation Sheet Saturday, 10 February 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)
- 9
- Relative number (R)
- 59
- Observer
- HM
- Reading
- all checks consistent
- File
- 19730210.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 3 | 13 | 01E | 30 | 23 | ||
| 2 | J – 1 | 10 | 15E | 16 | 20 | ||
| 3 | J – 2 | 7 | 18E | 13 | 22 | ||
| 4 | J – 1 | -5 | 58E | 333 | 24 | ||
| 5 | J – 2 | -17 | 81E | 310 | 25 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.