Daily Sunspot Evaluation
Observation Sheet Thursday, 27 July 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)
- 8
- Number of spots (f)
- 60
- Relative number (R)
- 140
- Observer
- ED
- Reading
- all checks consistent
- File
- 19720727.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 2 | 9 | 14E | 108 | |||
| 2 | J – 5 | 4 | 03E | 119 | |||
| 3 | B – 3 | -15 | 51E | 71 | |||
| 4 | A – 1 | -19 | 67E | 55 | |||
| 5 | E – 19 | -15 | 35E | 87 | |||
| 6 | B – 2 | -5 | 19E | 103 | |||
| 7 | A – 3 | -10 | 62W | 184 | |||
| 8 | E – 25 | 7 | 14W | 136 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.