9994 Grotius

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9994 Grotius
Orbit of 9994 Grotius (blue), planets (red) and the Sun (black). The outermost planet visible is Jupiter.
Discovery and designation
Discovered by C.J. van Houten, I. van Houten-Groeneveld & T. Gehrels
Discovery date September 24, 1960
Named after Hugo Grotius
Alternative names 4028 P-L, 1981 WH9
Orbital characteristics
Epoch October 27, 2007
Aphelion 3.0404076 AU
Perihelion 2.1284272 AU
Semi-major axis 2.5844174 AU
Eccentricity 0.1764383
Orbital period 1517.5479124 d
Mean anomaly 70.85615°
Inclination 7.16682°
Longitude of ascending node 207.32831°
Argument of perihelion 224.17255°
Physical characteristics
Surface temp. min mean max
Absolute magnitude (H) 14.3

9994 Grotius is a main belt asteroid. It orbits the Sun once every 4.15 years.[1]

Discovered on September 24, 1960 by C. J. van Houten and I. van Houten-Groeneveld on photographic plates made by T. Gehrels, it was given the provisional designation 4028 P-L. It was later renamed 9994 Grotius, to honour Hugo Grotius.[2]


  1. ^ "9994 Grotius (4028 P-L)". JPL Small-Body Database Browser. 
  2. ^ MPC 41571 Minor Planet Center