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46554 (1990 SZ8)
Classification: Main-belt Asteroid          SPK-ID: 2046554
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1511164222230076 4.5123e-08  
a 2.97169088389201 2.0207e-08 au
q 2.522619589565523 1.3372e-07 au
i 8.200824651651917 5.5593e-06 deg
node 32.92569926387958 2.9573e-05 deg
peri 289.4790157381918 3.5928e-05 deg
M 312.0318397953915 2.3829e-05 deg
tp 2459249.818460047319
(2021-Feb-04.31846005)
0.00012483 TDB
period 1871.129625030144
5.12
1.9085e-05
5.225e-08
d
yr
n .1923971461860642 1.9624e-09 deg/d
Q 3.420762178218498 2.3261e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1016  
   data-arc span      10869 days (29.76 yr)  
   first obs. used      1990-09-14  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51024  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 21:41:07  

Additional Information
 Earth MOID = 1.52564 au 
 Jupiter MOID = 1.97772 au 
 T_jup = 3.230 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.3   n/a MPO436107  
diameter diameter 3.764 km 0.469 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.286   0.154 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

46554 (1990 SZ8)          Discovered 1990-Sep-22 by Elst, E. W. at La Silla
Reference: 20020921/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1990 SZ8 = 2001 YY121 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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