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18328 (1985 UU)
Classification: Main-belt Asteroid          SPK-ID: 2018328
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1866308825006936 3.1965e-08  
a 2.427561371181267 8.2563e-09 au
q 1.974503450153114 7.9942e-08 au
i 10.43228903860698 4.1985e-06 deg
node 48.66886266649729 2.096e-05 deg
peri 17.28042906010636 2.4748e-05 deg
M 24.90062316284138 1.2349e-05 deg
tp 2458904.943228280841
(2020-Feb-25.44322828)
4.7358e-05 TDB
period 1381.509113002123
3.78
7.0479e-06
1.93e-08
d
yr
n .2605846002837383 1.3294e-09 deg/d
Q 2.880619292209421 9.7972e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1662  
   data-arc span      12795 days (35.03 yr)  
   first obs. used      1985-10-20  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48047  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:15:39  

Additional Information
 Earth MOID = .99008 au 
 Jupiter MOID = 2.46448 au 
 T_jup = 3.463 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.1   n/a MPO452430  
diameter diameter 4.892 km 0.174 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.203   0.043 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18328 (1985 UU)          Discovered 1985-Oct-20 by Mrkos, A. at Klet
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1985 UU = 2000 QJ66 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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