Observation 13.02.2018 · Istanbul University Observatory Solar Observations

Daily Sunspot Evaluation

Observation Details Tuesday, 13 February 2018

No: 18283
Date: 2018 / 02 / 13,375
Time: 09:00 UT
Seeing: 3 / 5
Number of groups (g): 1
Number of spots (f): 18
Relative number (R): 28
L_f: 2
P₀: -16.80°
B₀: -6.75°
L₀: 134.85°
Observer: Korhan YELKENCİ

Remarks: Bulutlar Arasında

13.02.2018 photosphere drawing

Sunspot groups

No	Group (class – spots)	B	Δ L	L	Δ L_f	U	NOAA
1	DAI – 18	-7	31.2W	166	33.2W	10.0

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