Daily Sunspot Evaluation
Observation Sheet Sunday, 27 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)
- 11
- Number of spots (f)
- 63
- Relative number (R)
- 173
- Observer
- HM
- Reading
- all checks consistent
- File
- 19800727.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ARK – 5 | 15 | 70W | 146 | 73W | 4 | |
| 2 | HAI – 13 | 11 | 24W | 100 | 27W | 3 | |
| 3 | HSK – 2 | 27 | 49E | 27 | 46E | 2 | |
| 4 | CSI – 10 | 18 | 51E | 24 | 49E | 8.5 | |
| 5 | AXX – 2 | 27 | 58E | 18 | 55E | 1.5 | |
| 6 | ? – 1 | -22 | 82W | 158 | 85W | 5 | |
| 7 | HAX – 2 | -14 | 49W | 125 | 52W | 2.5 | |
| 8 | CAI – 13 | -20 | 42W | 118 | 45W | 5.5 | |
| 9 | AXO – 2 | -33 | 16W | 92 | 19W | 2.5 | |
| 10 | HAI – 7 | -7 | 33E | 43 | 30E | 11.5 | |
| 11 | CAE – 6 | -9 | 42E | 34 | 39E | 5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.