Daily Sunspot Evaluation
Observation Details Thursday, 21 February 2013
- No
- 16751
- Date
- 2013 / 02 / 21,406
- Time
- 09:45 UT
- Seeing
- 3 / 5
- Number of groups (g)
- 5
- Number of spots (f)
- 40
- Relative number (R)
- 90
- Lf
- 1
- P0
- -19.46°
- B0
- -7.06°
- L0
- 10.10°
- Observer
- Hikmet ÇAKMAK
Remarks: Bulutlar Arasında, Hafif Sis
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | NOAA |
|---|---|---|---|---|---|---|---|
| 1 | HA_ – 1 | 15 | 65W | 75 | 66W | 1.6 | |
| 2 | EAI – 16 | 10 | 59W | 69 | 60W | 10.4 | |
| 3 | HS_ – 3 | 12 | 29W | 39 | 30W | 1.4 | |
| 4 | BXI – 16 | -10 | 00W | 10 | 01W | 8.3 | |
| 5 | HA_ – 4 | -19 | 23E | 347 | 22E | 2.4 |
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