Daily Sunspot Evaluation
Observation Sheet Sunday, 2 September 1990
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)
- 9
- Number of spots (f)
- 54
- Relative number (R)
- 144
- Observer
- TÖ0
- Reading
- all checks consistent
- File
- 19900902.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | EKC – 18 | 14 | 49W | 34 | 52W | 14.5 | E1,3 |
| 2 | HS – 1 | 16 | 15E | 330 | 12E | 2 | E2 |
| 3 | CAI – 7 | 12 | 28E | 317 | 25E | 6 | 406 |
| 4 | ? – 2 | 3 | 80E | 265 | 77E | 5 | 409 |
| 5 | ? – 1 | -27 | 75W | 60 | 78W | - | 389 |
| 6 | AR – 1 | -20 | 01W | 346 | 04W | 0.5 | 404 |
| 7 | CSI – 17 | -13 | 08E | 337 | 05E | 7.5 | 412 |
| 8 | BXI – 5 | -14 | 32E | 313 | 29E | 5 | 408 |
| 9 | AR – 2 | -15 | 57E | 288 | 54E | - | 410 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.