Daily Sunspot Evaluation
Observation Sheet Thursday, 9 April 1998
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)
- 8
- Number of spots (f)
- 39
- Relative number (R)
- 119
- Observer
- TA
- Reading
- all checks consistent
- File
- 19980409.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 1 | -21 | 78W | 146 | 81W | - | 56 55 |
| 2 | DAO – 9 | -28 | 19W | 87 | 22W | 7 | 66 64 |
| 3 | ESO – 11 | -23 | 15W | 83 | 18W | 11.5 | 61 66 |
| 4 | HR – 5 | -22 | 14E | 54 | 11E | 2 | 69 64 |
| 5 | ESO – 4 | -20 | 32E | 36 | 21E | 10.5 | 62 61 |
| 6 | HR – 1 | -28 | 35E | 33 | 32E | 1 | 12 62 |
| 7 | CSO – 5 | -29 | 58E | 10 | 55E | 6 | 62 65 |
| 8 | BZO – 3 | -23 | 63E | 5 | 60E | 5 | 66 66 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.