Daily Sunspot Evaluation
Observation Sheet Friday, 19 May 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)
- 51
- Relative number (R)
- 121
- Observer
- HM
- Reading
- all checks consistent
- File
- 19720519.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 2 | 8 | 05E | 309 | |||
| 2 | H – 8 | 14 | 16E | 298 | |||
| 3 | F – 14 | -13 | 17E | 297 | |||
| 4 | J – 4 | -7 | 05W | 319 | |||
| 5 | E – 17 | -5 | 15W | 329 | |||
| 6 | J – 5 | -7 | 57W | 11 | |||
| 7 | A – 1 | -2 | 04W | 318 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.