Daily Sunspot Evaluation
Observation Sheet Wednesday, 18 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)
- 11
- Number of spots (f)
- 84
- Relative number (R)
- 194
- Observer
- OG
- Reading
- all checks consistent
- File
- 19800618.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DKE – 20 | 18 | 48W | 279 | 51W | 10 | |
| 2 | DAI – 14 | 16 | 11E | 220 | 08E | 4.5 | |
| 3 | ? – 1 | 25 | 73E | 158 | 70E | - | |
| 4 | ? – 2 | -24 | 70W | 301 | 73W | - | |
| 5 | HKX – 10 | -13 | 41W | 272 | 44W | 8 | |
| 6 | BXO – 5 | -9 | 41E | 190 | 38E | 6.5 | |
| 7 | CAI – 17 | -12 | 52E | 179 | 49E | 7 | |
| 8 | AXX – 4 | -17 | 54E | 177 | 51E | 5 | |
| 9 | HAX – 2 | -21 | 61E | 170 | 58E | 2 | |
| 10 | ? – 8 | -28 | 70E | 161 | 67E | 10 | |
| 11 | ? – 1 | -12 | 80E | 151 | 77E | - |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.