Daily Sunspot Evaluation
Observation Sheet Thursday, 28 May 1970
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)
- 13
- Number of spots (f)
- 82
- Relative number (R)
- 212
- Observer
- FA
- Reading
- all checks consistent
- File
- 19700528.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 2 | 5 | 14E | 111 | |||
| 2 | J – 1 | 11 | 32E | 93 | |||
| 3 | H – 2 | 16 | 71E | 54 | |||
| 4 | H – 5 | -9 | 59E | 66 | |||
| 5 | J – 1 | -13 | 68E | 57 | |||
| 6 | G – 2 | -20 | 65E | 60 | |||
| 7 | A – 10 | -11 | 06E | 119 | |||
| 8 | E – 30 | -8 | 06W | 131 | |||
| 9 | D – 24 | -15 | 31W | 156 | |||
| 10 | A – 1 | 13 | 41W | 166 | |||
| 11 | A – 1 | 16 | 18W | 143 | |||
| 12 | A – 1 | 21 | 19W | 144 | |||
| 13 | A – 2 | 19 | 12W | 137 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.