For example asteroids.dat present in ~/.local/share/kstars/
for juno have this value:
Juno",58000,1.9831097555902,2.668531209360437,.256853452328373,12.98996127586185,248.2064931516843,169.8582922221972,259.2348903006959,20181123.6711667,"JPL 105",5.33,0.32,N,,,246.596,,0.214,7.210,4.35929873879669,1.03493,3.3633E-6
"
In other site i found this value ( theskylive site ):
Asteroid 3 Juno Orbital Elements
The following table lists the orbital elements of Asteroid 3 Juno at epoch 03 September 2017 00:00 UTC (JD: 2458000.5). Source: JPL Small-Body Database
Element Symbol Value
Orbit eccentricity e 0.25685345
Orbit inclination i 12.98996128°
Perihelion distance q 1.98310976 AU
296,668,997 km
Aphelion distance Q 3.35395266 AU
501,744,178 km
Semi-major axis a 2.66853121 AU
399,206,588 km
Orbital period period 4.3600 years
1,592.2339 days
Date of perihelion transit Tp 2018-Nov-23 16:06:28
2,458,446.1712 JD
Argument of perihelion peri 248.20649315168°
Longitude of the ascending node node 169.8582922222°
Mean anomaly M 259.2348903007°
Mean motion n 0.22609744°/day
Closest approach to Earth* 2018-Nov-16
Distance of closest approach* 1.03592987 AU
154,972,902 km
Now search to import this.