Daily Sunspot Evaluation
Observation Sheet Sunday, 31 August 1997
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)
- 61
- Relative number (R)
- 111
- Observer
- TA
- Reading
- all checks consistent
- File
- 19970831.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CRO – 6 | 18 | 36W | 137 | 38W | 6 | 68 |
| 2 | AX – 2 | 19 | 20W | 121 | 22W | 0.5 | 69 |
| 3 | AXO – 6 | 21 | 14W | 112 | 13W | 7.5 | 67 |
| 4 | FAI – 46 | 29 | 06W | 107 | 08W | 16 | 62 |
| 5 | ? – 1 | 35 | 85E | 16 | 83E | 70 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.