Daily Sunspot Evaluation
Observation Sheet Tuesday, 17 June 1980
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)
- 10
- Number of spots (f)
- 63
- Relative number (R)
- 163
- Observer
- HM
- Reading
- all checks consistent
- File
- 19800617.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | EKI – 18 | 18 | 34W | 279 | 37W | 10.5 | |
| 2 | CAO – 4 | 13 | 34W | 279 | 37W | 7 | |
| 3 | DAO – 5 | 11 | 10E | 235 | 07E | 3 | |
| 4 | CAO – 8 | 16 | 28E | 217 | 25E | 9 | |
| 5 | BBO – 3 | -22 | 59W | 304 | 62W | 3 | |
| 6 | HAX – 13 | -13 | 26W | 271 | 29W | 8 | |
| 7 | AXX – 1 | -13 | 16W | 261 | 19W | - | |
| 8 | DAO – 4 | -8 | 53E | 192 | 50E | 3.5 | |
| 9 | HAX – 4 | -12 | 63E | 182 | 60E | 4.5 | |
| 10 | CKO – 3 | -20 | 72E | 173 | 69E | 7 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.