Daily Sunspot Evaluation
Observation Sheet Tuesday, 20 June 1978
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)
- 71
- Relative number (R)
- 201
- Observer
- GA
- Reading
- all checks consistent
- File
- 19780620.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 2 | 32 | 46E | 87 | 43E | ||
| 2 | ? – 3 | 26 | 74E | 59 | 71E | ||
| 3 | C – 3 | 19 | 47E | 86 | 44E | ||
| 4 | D – 9 | 18 | 72E | 61 | 69E | ||
| 5 | ? – 2 | -17 | 79E | 54 | 76E | ||
| 6 | C – 19 | -24 | 20E | 113 | 17E | ||
| 7 | J – 1 | 18 | 75W | 208 | 78W | ||
| 8 | A – 2 | 17 | 69W | 202 | 72W | ||
| 9 | B – 3 | 24 | 54W | 187 | 57W | ||
| 10 | A – 1 | 18 | 36W | 169 | 39W | ||
| 11 | D – 13 | 17 | 29W | 162 | 32W | ||
| 12 | B – 6 | 19 | 17W | 150 | 20W | ||
| 13 | D – 7 | 11 | 02W | 135 | 05W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.