Daily Sunspot Evaluation
Observation Sheet Friday, 16 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)
- 8
- Number of spots (f)
- 28
- Relative number (R)
- 108
- Observer
- HM
- Reading
- all checks consistent
- File
- 19730216.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 12 | -3 | 25E | 287 | 23 | ||
| 2 | D – 9 | -17 | 06E | 306 | 25 | ||
| 3 | A – 1 | -18 | 13W | 325 | 29 | ||
| 4 | A – 2 | -19 | 42W | 354 | 30 | ||
| 5 | A – 1 | -4 | 23W | 335 | 24 | ||
| 6 | J – 1 | 7 | 63W | 15 | 12 | ||
| 7 | J – 1 | 12 | 65W | 17 | 20 | ||
| 8 | J – 1 | 17 | 76W | 28 | 23 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.