Daily Sunspot Evaluation
Observation Sheet Thursday, 1 February 1968
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)
- 171
- Relative number (R)
- 291
- Observer
- SB
- Reading
- all checks consistent
- File
- 19680201.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 7 | 23 | 16E | 127 | |||
| 2 | A – 1 | 26 | 28E | 115 | |||
| 3 | G – 4 | 12 | 28E | 115 | |||
| 4 | J – 1 | 20 | 46E | 97 | |||
| 5 | G – 2 | 7 | 50E | 93 | |||
| 6 | J – 1 | 12 | 72E | 71 | |||
| 7 | C – 29 | -15 | 56E | 87 | |||
| 8 | C – 13 | -12 | 26E | 118 | |||
| 9 | J – 1 | -28 | 59E | 84 | |||
| 10 | B – 12 | -13 | 12W | 155 | |||
| 11 | C – 8 | -11 | 24W | 167 | |||
| 12 | F – 92 | 14 | 18W | 161 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.