Daily Sunspot Evaluation
Observation Sheet Saturday, 28 July 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)
- 55
- Relative number (R)
- 155
- Observer
- AÖ0
- Reading
- all checks consistent
- File
- 19790728.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 13 | 00 | 212 | 02W | 108 | |
| 2 | C – 17 | 15 | 25E | 187 | 23E | 111 | |
| 3 | J – 1 | 5 | 62E | 150 | 60E | 117 | |
| 4 | A – 1 | -15 | 60E | 152 | 58E | 118 | |
| 5 | G – 2 | -20 | 47E | 165 | 45E | 114 | |
| 6 | C – 15 | -15 | 10W | 222 | 12W | 112 | |
| 7 | D – 14 | -16 | 33W | 245 | 35W | 115 | |
| 8 | J – 2 | -8 | 71W | 283 | 73W | 107 | |
| 9 | J – 1 | 9 | 65W | 277 | 67W | 100 | |
| 10 | J – 1 | 30 | 83W | 295 | 85W | 102 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.