A search for the origin of the interstellar comet 2I/Borisov

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Volume 634 (February 2020)

A&A, 634 (2020) A14

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Table 1

Solutions for the incoming asymptotic trajectory (velocity vector) of 2I/Borisov.

Solution	α	δ	v_∞	σ(v_x)	σ(v_y)	σ(v_z)	ρ(v_x, v_y)	ρ(v_x, v_z)	ρ(v_y, v_z)
	[deg]	[deg]	[km s⁻¹]	[km s⁻¹]	[km s⁻¹]	[km s⁻¹]
38	32.79806	59.44090	32.284055	0.0001812	0.0002747	0.0004150	0.8210	0.8735	0.9878
39	32.79823	59.44022	32.284287	0.0003626	0.0003430	0.0005600	0.8465	0.8937	0.9761
40	32.79809	59.44016	32.284313	0.0003774	0.0003438	0.0005601	0.7925	0.8632	0.9725
41	32.79751	59.44008	32.283096	0.0005672	0.0005446	0.0011744	0.8654	0.9090	0.9664
42	32.80272	59.44094	32.279114	0.0006349	0.0003488	0.0011396	0.3297	0.8514	0.6946
43	32.79926	59.43894	32.285134	0.0017506	0.0006598	0.0022294	0.8543	0.9588	0.9173
44	32.79747	59.44015	32.282620	0.0005058	0.0005272	0.0010957	0.8971	0.9430	0.9636
45	32.79747	59.44015	32.282644	0.0004957	0.0005208	0.0010804	0.8989	0.9437	0.9646
46	32.79798	59.44021	32.284561	0.0018604	0.0015284	0.0041306	0.9886	0.9912	0.9925
47	32.79720	59.44014	32.286894	0.0024122	0.0011258	0.0041225	0.9282	0.9886	0.9500

Notes. (α, δ) and v_∞ give the barycentric ICRF (International Celestial Reference Frame) direction and asymptotic velocity of 2I/Borisov. σ(v_x), σ(v_y), σ(v_z) are the standard deviations of the Cartesian ICRF velocity components; the last three columns give the correlation coefficients ρ. For orientation, the Galactic coordinates of these solutions are l =132.9°, b = −1.9°. We use only solution 47 in the analysis.

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