Daily Sunspot Evaluation
Observation Sheet Tuesday, 16 January 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)
- 11
- Number of spots (f)
- 77
- Relative number (R)
- 187
- Observer
- MB
- Reading
- all checks consistent
- File
- 19900116.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | BRO – 6 | 12 | 13W | 142 | 16W | 6 | 12 |
| 2 | BXO – 5 | 42 | 10E | 119 | 07E | 6 | 25 |
| 3 | EAI – 17 | 33 | 16E | 113 | 13E | 12.5 | 20 |
| 4 | EAI – 36 | 22 | 24E | 105 | 21E | 11 | 21 |
| 5 | HS – 1 | 26 | 62E | 67 | 59E | 2 | 26 |
| 6 | HS – 1 | -15 | 81W | 210 | 84W | 2.5 | 9 |
| 7 | HS – 1 | -23 | 62W | 191 | 65W | 2 | 10 |
| 8 | AR – 2 | -36 | 01E | 128 | 02W | 0.5 | 16 |
| 9 | HS – 1 | -30 | 18E | 110 | 16E | 1.5 | 19 |
| 10 | HA – 6 | -20 | 25E | 104 | 22E | 2 | 22 |
| 11 | HA – 1 | -9 | 76E | 53 | 73E | 2 | 27 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.