Daily Sunspot Evaluation
Observation Sheet Friday, 28 January 1972
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)
- 10
- Number of spots (f)
- 46
- Relative number (R)
- 146
- Observer
- HM
- Reading
- all checks consistent
- File
- 19720128.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 2 | 14 | 27E | 326 | |||
| 2 | A – 1 | -6 | 01E | 352 | |||
| 3 | C – 6 | 15 | 39E | 314 | |||
| 4 | A – 2 | 9 | 48E | 305 | |||
| 5 | C – 18 | -14 | 14E | 339 | |||
| 6 | B – 5 | -13 | 13E | 340 | |||
| 7 | A – 1 | -17 | 09E | 344 | |||
| 8 | J – 2 | -16 | 51W | 44 | |||
| 9 | A – 1 | -15 | 60W | 53 | |||
| 10 | D – 8 | -9 | 53W | 46 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.