Daily Sunspot Evaluation
Observation Sheet Sunday, 18 February 1979
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)
- 45
- Relative number (R)
- 145
- Observer
- AÖ0
- Reading
- all checks consistent
- File
- 19790218.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 19 | 17 | 18E | 148 | 16E | 109 | |
| 2 | ? – 1 | -24 | 78E | 88 | 76E | 112 | |
| 3 | J – 1 | -26 | 34E | 132 | 32E | 108 | |
| 4 | J – 3 | -15 | 10W | 176 | 12W | 110 | |
| 5 | J – 1 | -41 | 58W | 224 | 60W | 97 | |
| 6 | ? – 1 | -18 | 72W | 238 | 74W | 91 | |
| 7 | J – 1 | 19 | 44W | 210 | 46W | 107 | |
| 8 | D – 8 | 7 | 14W | 180 | 16W | 113 | |
| 9 | H – 9 | 17 | 11W | 177 | 13W | 106 | |
| 10 | J – 1 | 2 | 03W | 169 | 05W | 105 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.