Daily Sunspot Evaluation
Observation Sheet Monday, 28 July 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)
- 12
- Number of spots (f)
- 60
- Relative number (R)
- 180
- Observer
- AÖ0
- Reading
- all checks consistent
- File
- 19800728.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 2 | 15 | 84W | 147 | 87W | 7 | |
| 2 | HAI – 14 | 11 | 38W | 101 | 41W | 2.5 | |
| 3 | CAO – 12 | 19 | 35E | 28 | 32E | 6 | |
| 4 | HAX – 2 | 27 | 36E | 27 | 33E | 2 | |
| 5 | AXX – 2 | 28 | 45E | 18 | 42E | - | |
| 6 | AXX – 3 | 11 | 46E | 17 | 47E | 2 | |
| 7 | HAX – 2 | -14 | 61W | 124 | 64W | 3 | |
| 8 | DAO – 3 | -20 | 58W | 121 | 61W | 3 | |
| 9 | DAO – 5 | -34 | 30W | 93 | 33W | 6 | |
| 10 | HAX – 4 | -7 | 19E | 44 | 16E | 2 | |
| 11 | CAI – 8 | -9 | 29E | 34 | 26E | 3 | |
| 12 | BAO – 3 | -9 | 36E | 27 | 33E | 3 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.