Daily Sunspot Evaluation
Observation Sheet Friday, 16 March 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)
- 44
- Relative number (R)
- 134
- Observer
- YK
- Reading
- all checks consistent
- File
- 19900316.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HR – 1 | 11 | 75W | 147 | 78W | 2 | 104 |
| 2 | HA – 2 | 21 | 28W | 100 | 31W | 2.5 | 106 |
| 3 | DKC – 16 | 33 | 04W | 73 | 04W | 10 | 108 |
| 4 | AX – 1 | 30 | 24E | 48 | 21E | - | 118 |
| 5 | DAO – 4 | 42 | 39E | 33 | 36E | 6.5 | 116 |
| 6 | HS – 1 | 5 | 46E | 26 | 43E | 1 | 113 |
| 7 | ? – 6 | 16 | 70E | 2 | 67E | 12 | 117 |
| 8 | EKO – 11 | -35 | 54E | 18 | 51E | 13.7 | 114 |
| 9 | HS – 2 | -20 | 53E | 19 | 50E | 1.5 | 115 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.