Daily Sunspot Evaluation
Observation Sheet Sunday, 8 April 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)
- 12
- Number of spots (f)
- 71
- Relative number (R)
- 191
- Observer
- TÖ0
- Reading
- all checks consistent
- File
- 19900408.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | BRI – 16 | 31 | 52W | 180 | 55W | 8 | 145 |
| 2 | EKC – 25 | 21 | 30W | 158 | 33W | 14 | 143 |
| 3 | HA – 5 | 23 | 26E | 102 | 23E | 3.5 | 148 |
| 4 | AX – 1 | 20 | 37E | 91 | 34E | - | 149 |
| 5 | BXO – 6 | 15 | 48E | 80 | 45E | 3 | 153 |
| 6 | HA – 1 | 31 | 53E | 75 | 50E | 2. | 151 |
| 7 | HS – 1 | -8 | 52W | 180 | 55W | 1.5 | 141 |
| 8 | AX – 2 | -26 | 24W | 152 | 23W | 2. | 144 |
| 9 | BXO – 3 | -19 | 17W | 145 | 20W | 3 | 150 |
| 10 | AX – 2 | -25 | 15W | 143 | 18W | - | 154 |
| 11 | AX – 1 | -10 | 05W | 133 | 08W | - | 155 |
| 12 | CAO – 8 | -42 | 49E | 81 | 44E | 10 | 152 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.