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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1866990021241539 3.0924e-08  
a 2.427509240356812 7.8494e-09 au
q 1.974295687535033 7.6939e-08 au
i 10.43219941502607 4.0912e-06 deg
node 48.66262649632865 2.0827e-05 deg
peri 17.25980199175263 2.4454e-05 deg
M 77.03410495556106 1.2269e-05 deg
tp 2458904.889194625600
(2020-Feb-25.38919463)
4.6905e-05 TDB
period 1381.464612280167
3.78
6.7005e-06
1.834e-08
d
yr
n .2605929944204683 1.264e-09 deg/d
Q 2.880722793178592 9.3149e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1838  
   data-arc span      12939 days (35.43 yr)  
   first obs. used      1985-10-20  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47579  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:42:31  

Additional Information
 Earth MOID = .989226 au 
 Jupiter MOID = 2.46511 au 
 T_jup = 3.463 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457233.5 (2015-Jul-30.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1853145160666569 3.0942e-08  
q 1.978260937743697 7.6899e-08 au
tp 2457520.959841629182
(2016-May-12.45984163)
4.7444e-05 TDB
node 48.696000347925 2.0832e-05 deg
peri 16.79135836623838 2.4548e-05 deg
i 10.43034013111175 4.093e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1838  
   data-arc span      12939 days (35.43 yr)  
   first obs. used      1985-10-20  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47579  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:42:31  

Additional Information
 Jupiter MOID = 2.46511 au 
 T_jup = 3.463 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.574224449950596E-16 -2.37177934117518E-15 -6.595448295670778E-13 -3.911683509482637E-15 -1.82846009098659E-13 1.188045499637088E-16
q -2.37177934117518E-15 5.913408097652207E-15 1.593818613026549E-12 8.739291529219609E-15 4.408439419157963E-13 1.09295518383742E-17
tp -6.595448295670778E-13 1.593818613026549E-12 2.250950644604665E-9 1.487056362965509E-11 6.306518655080549E-10 -3.693527965412026E-12
node -3.911683509482637E-15 8.739291529219609E-15 1.487056362965509E-11 4.339622817457921E-10 -4.22339614819524E-10 -3.744845736550765E-11
peri -1.82846009098659E-13 4.408439419157963E-13 6.306518655080549E-10 -4.22339614819524E-10 6.025924262034972E-10 3.580054801697485E-11
i 1.188045499637088E-16 1.09295518383742E-17 -3.693527965412026E-12 -3.744845736550765E-11 3.580054801697485E-11 1.675225802502832E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.18   n/a E2021B10  
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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