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Table 1

Osculating heliocentric orbit of ’Oumuamua, based on 118 positional observations spanning the interval from 2017 Oct. 14 to 2017 Nov. 10, available at MPC on 2017 Nov. 12.

Eccentricity 1.199236 ± 0.000164
Inverse of the semimajor axis [AU−1] −0.780603 ± 0.000618
Time of perihelion passage [TT] 2017 Sept. 09.488519 ± 0.001243
Inclination [deg] 122.677069 ± 0.005823
Argument of perihelion [deg] 241.683487 ± 0.011254
Longitude of the ascending node [deg] 24.599729 ± 0.000264
Epoch of osculation [TT] 2017 Sept. 4.0 = JD 2458000.5
Perihelion distance [AU] 0.255234 ± 0.000062

Notes. Equator and ecliptic of J2000 is used. The obtained RMS is 0.35arcsec.

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