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47048 (1998 WW18)
Classification: Main-belt Asteroid          SPK-ID: 2047048
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06612474234751434 3.3852e-08  
a 2.731790857994329 1.3735e-08 au
q 2.551151891362159 9.8017e-08 au
i 6.389512856814818 4.2312e-06 deg
node 241.7544482469743 3.082e-05 deg
peri 79.12659464933056 4.4605e-05 deg
M 8.001147175240616 3.2428e-05 deg
tp 2458963.846170437015
(2020-Apr-24.34617044)
0.00014848 TDB
period 1649.185842188643
4.52
1.2438e-05
3.405e-08
d
yr
n .2182895285604939 1.6463e-09 deg/d
Q 2.912429824626499 1.4643e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1737  
   data-arc span      7586 days (20.77 yr)  
   first obs. used      1998-11-18  
   last obs. used      2019-08-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49027  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 08:40:04  

Additional Information
 Earth MOID = 1.54787 au 
 Jupiter MOID = 2.27837 au 
 T_jup = 3.342 
[ 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 13.8   n/a MPO257187  
diameter diameter 5.124 km 0.335 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 17.29 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Warner, B.D.; Erasmus, N. (2019) Minor Planet Bull. 46, 166-179.]
geometric albedo albedo 0.244   0.036 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

47048 (1998 WW18)          Discovered 1998-Nov-21 by LINEAR at Socorro
Reference: 20020921/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1998 WW18 = 1998 WG4 = 2000 EW19 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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