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48439 (1989 WR2)
Classification: Main-belt Asteroid          SPK-ID: 2048439
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2439064454737714 3.1268e-08  
a 2.682599816294584 1.4749e-08 au
q 2.02829643047358 8.2028e-08 au
i 13.28871305917826 4.7248e-06 deg
node 54.62245772970802 2.2174e-05 deg
peri 34.64169137493612 2.5523e-05 deg
M 313.5160520982545 1.3113e-05 deg
tp 2459207.720524030386
(2020-Dec-24.22052403)
5.9354e-05 TDB
period 1604.841929704896
4.39
1.3235e-05
3.624e-08
d
yr
n .2243211579511747 1.8499e-09 deg/d
Q 3.336903202115588 1.8346e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1361  
   data-arc span      12116 days (33.17 yr)  
   first obs. used      1987-05-30  
   last obs. used      2020-07-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49434  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 04:34:00  

Additional Information
 Earth MOID = 1.05802 au 
 Jupiter MOID = 1.9998 au 
 T_jup = 3.295 
[ 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 13.5   n/a MPO412506  
diameter diameter 10.499 km 0.358 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.101   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

48439 (1989 WR2)          Discovered 1989-Nov-20 by Ueda, S., Kaneda, H. at Kushiro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1989 WR2 = 1987 KR3 = 1998 XW38 = 2000 HL57 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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