Daily Sunspot Evaluation
Observation Sheet Sunday, 28 October 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)
- 10
- Number of spots (f)
- 86
- Relative number (R)
- 186
- Observer
- MB
- Reading
- all checks consistent
- File
- 19901028.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DSI – 4 | 20 | 68°W | 33 | 71°W | 15° | 486 |
| 2 | AX – 1 | 4 | 67°W | 32 | 70°W | 0.5 | 489 |
| 3 | BRI – 11 | 18 | 55°W | 20 | 58°W | 11° | 491 |
| 4 | AX – 2 | 19 | 42°W | 7 | 45°W | 1.5 | 498 |
| 5 | BRI – 15 | 8 | 55°E | 270 | 52°E | 6° | 504 |
| 6 | AR – 1 | -27 | 75°W | 40 | 78°W | 1° | 487 |
| 7 | BRO – 11 | -21 | 28°W | 353 | 31°W | 7° | 505 |
| 8 | DKC – 38 | -15 | 01°E | 324 | 02°W | 10° | 501 |
| 9 | AX – 1 | -16 | 57°E | 268 | 54°E | - | 506 |
| 10 | ? – 2 | -5 | 80°E | 245 | 77°E | 4° | 509 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.