P/2010 A2 LINEAR - I. An impact in the asteroid main belt

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Table 2

Observation log.

Obs. date	r¹	Δ²	α³	PsAng⁴	PsAMV⁵	PlAng⁶	Tel-Ins⁷	Who⁸	Obs.		Seeing	Comments
UT 2010	[AU]	[AU]	[deg]	[deg]	[deg]	[deg]					[arcsec]
14.2 Jan.	2.013	1.040	5.6	123.3	280.1	–2.2	NTT	OH	1200	B,	1.6	Poor seeing
							EFOSC2		600	V,
									2400	R,
									800	i
16.2 Jan.	2.014	1.045	6.7	117.7	279.8	–2.0	NTT	HH	900	B,	1.4	Poor seeing
							EFOSC2		600	V
									1500	R,
									600	i
17.2 Jan.	2.014	1.048	7.2	115.5	279.7	–2.0	NTT	HH	600	B,	1.1
							EFOSC2		600	V
									1200	R,
									600	i
18.2 Jan.	2.015	1.051	7.8	113.6	279.6	–1.9	NTT EFOSC2	HH	3600	R	0.9–1.6
19.5 Jan.	2.015	1.055	8.5	111.5	279.4	–1.8	GN GMOS	OH/GT	3000	r ′	0.5–0.7	Excellent seeing.
22.3 Jan.	2.016	1.066	10.0	107.9	279.1	–1.5	UH Tek	BY	1800	B	0.5–0.8
							Tek		1750	V
									7250	R,
									1800	I
23.4 Jan.	2.017	1.071	10.6	106.8	279.0	–1.4	UH Tek	BY	3000	R	1.0
25.3 Jan.	2.018	1.080	11.7	105.2	278.8	–1.3	UH Tek	BY	4000	r ′	0.7
02.3 Feb.	2.022	1.125	15.6	100.4	278.3	–0.6	GN GMOS	OH/GT	3000	r ′	0.5
19.5 Feb.	2.032	1.262	22.3	96.3	278.3	0.7	UH Tek	JP	1500	R	1.2	Star on object

Notes.

^{(1), (2)}

Helio- and geocentric distances;

⁽³⁾

solar phase angle;

⁽⁴⁾

position angle of the extended Sun-Target radius vector;

⁽⁵⁾

position angle of the negative of the target’s heliocentric velocity vector;

⁽⁶⁾

angle between observer and target orbital plane, measured from target;

⁽⁷⁾

telescope and instrument: NTT = New Technology Telescope, GN = Genini North, UH = UH 2.2-m;

⁽⁸⁾

observer initials: OH = O. Hainaut, HH = H. Hsieh, GT= G. Trancho, BY= B. Yang, JP = J. Pittichová;

⁽⁹⁾

total on-target exposure time [sec], and filter.

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