Daily Sunspot Evaluation
Observation Sheet Tuesday, 29 February 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)
- 7
- Number of spots (f)
- 37
- Relative number (R)
- 107
- Observer
- HM
- Reading
- all checks consistent
- File
- 19720229.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 21 | 28E | 263 | |||
| 2 | J – 7 | -8 | 33E | 258 | |||
| 3 | J – 4 | -9 | 69E | 222 | |||
| 4 | B – 5 | -11 | 02E | 289 | |||
| 5 | H – 7 | -16 | 56W | 347 | |||
| 6 | A – 1 | 3 | 28W | 319 | |||
| 7 | C – 12 | 9 | 04W | 295 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.