Daily Sunspot Evaluation
Observation Sheet Wednesday, 29 July 1987
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)
- 5
- Number of spots (f)
- 22
- Relative number (R)
- 72
- Observer
- HG
- Reading
- all checks consistent
- File
- 19870729.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAI – 13 | 29 | 09E | 143 | 07E | 11.55 | 47 |
| 2 | BXO – 2 | 20 | 01E | 151 | 01W | 2.56 | 48 |
| 3 | HAX – 2 | -24 | 33W | 185 | 35W | 1.552 | 44 |
| 4 | AXX – 1 | -22 | 25W | 177 | 27W | -57 | 49 |
| 5 | BRI – 4 | -30 | 21W | 173 | 23W | 1.558 | 50 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.