Daily Sunspot Evaluation
Observation Sheet Monday, 28 August 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)
- 11
- Number of spots (f)
- 83
- Relative number (R)
- 193
- Observer
- HM
- Reading
- all checks consistent
- File
- 19720828.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 17 | 11 | 75E | 344 | |||
| 2 | B – 8 | 13 | 48E | 11 | |||
| 3 | J – 6 | -4 | 46E | 13 | |||
| 4 | H – 12 | -7 | 24E | 35 | |||
| 5 | C – 17 | -18 | 01W | 60 | |||
| 6 | H – 7 | -15 | 20W | 79 | |||
| 7 | A – 1 | -6 | 25W | 84 | |||
| 8 | A – 1 | -20 | 57W | 116 | |||
| 9 | B – 3 | -3 | 53W | 112 | |||
| 10 | J – 1 | 9 | 58W | 117 | |||
| 11 | D – 10 | 17 | 17W | 76 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.