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Table 2

Parameters of the model found after fitting to the astrometrical observations and corresponding osculating elements for comet 19P/Borrelly.

Parameter Value and error

Position x 0.481390947 ± 3.72 × 10-7 AU
Position y 1.196797597 ± 2.72 × 10-7 AU
Position z 0.425142676 ± 3.18 × 10-7 AU
Velocity Vx  − 1.502141214 × 10-2 ± 3.91 × 10-9 AU   days-1
Velocity Vy 2.001264858 × 10-3 ± 4.36 × 10-9 AU   days-1
Velocity Vz 1.114184800 × 10-2 ± 4.13 × 10-9 AU   days-1
C1/MC 1.84 × 10-15 ± 1.06 × 10-15 kg-1
C2/MC 1.26 × 10-14 ± 4.11 × 10-16 kg-1
C3/MC 9.42 × 10-15 ± 9.18 × 10-16 kg-1

Time of perihelion passage September, 14.72972 2001 TT  ±  1.0 × 10-4 h
Argument of periapsis ω 353.3749882  ±  2.54 × 10 − 5°
Longitude of the ascending node Ω 75.4249176  ±  3.39 × 10 − 5°
Inclination i 30.3247261  ±  1.61 × 10 − 5°
Perihelion distance q 1.3582105  ±  3.0 × 10-7 AU
Eccentricity e 0.6238974  ±  1.1 × 10-6
Semi-major axis a 3.6112765  ±  1.13 × 10-5 AU
Mean motion n 0.14361935  ±  6.7 × 10 − 5°/days
Period P 6.863 ± 3.21 × 10-5 years

Notes. The position and velocity are given at the Julian epoch 2 452 166.50 (14/09/2001, 0h00 TT).

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