Observation 11.04.2011 · Istanbul University Observatory Solar Observations

Daily Sunspot Evaluation

Observation Details Monday, 11 April 2011

No: 16178
Date: 2011 / 04 / 11,278
Time: 06:40 UT
Seeing: 3 / 5
Number of groups (g): 4
Number of spots (f): 59
Relative number (R): 99
L_f: 3
P₀: -26.22°
B₀: -5.92°
L₀: 14.14°
Observer: Korhan YELKENCİ

Remarks: Kenar Titremesi

11.04.2011 photosphere drawing

Sunspot groups

No	Group (class – spots)	B	Δ L	L	Δ L_f	U	NOAA
1	CAI – 31	16	12W	26	15W	6.7
2	DAC – 19	22	04E	10	01E	10.5
3	BXI – 4	12	35E	339	32E	3.6
4	BXI – 5	-21	23E	351	20E	4.1

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