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52248 (1981 EE15)
Classification: Main-belt Asteroid          SPK-ID: 2052248
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06802352709638924 5.0369e-08  
a 2.784516083467305 2.3072e-08 au
q 2.595103478213235 1.408e-07 au
i 5.029591708008167 5.5523e-06 deg
node 283.3044391285266 6.0878e-05 deg
peri 253.57639089 7.2705e-05 deg
M 161.0661162609385 4.0698e-05 deg
tp 2458241.180227407007
(2018-May-02.68022741)
0.0001902 TDB
period 1697.160920491948
4.65
2.1093e-05
5.775e-08
d
yr
n .2121189544569813 2.6363e-09 deg/d
Q 2.973928688721374 2.4641e-08 au
  Orbit Determination Parameters
   # obs. used (total)      492  
   data-arc span      13611 days (37.26 yr)  
   first obs. used      1981-02-09  
   last obs. used      2018-05-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61497  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-04 01:01:19  

Additional Information
 Earth MOID = 1.60489 au 
 Jupiter MOID = 2.02884 au 
 T_jup = 3.323 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456741.5 (2014-Mar-25.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06562289425267623 5.0568e-08  
q 2.602813280808774 1.409e-07 au
tp 2456540.643587836416
(2013-Sep-05.14358784)
0.00019459 TDB
node 283.3836205119931 6.0978e-05 deg
peri 253.33381057974 7.3519e-05 deg
i 5.023908448366902 5.547e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      492  
   data-arc span      13611 days (37.26 yr)  
   first obs. used      1981-02-09  
   last obs. used      2018-05-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61497  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-04 01:01:19  

Additional Information
 Jupiter MOID = 2.02884 au 
 T_jup = 3.323 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.557167029912856E-15 -7.042273020306417E-15 -4.838985119958265E-13 -1.632441128376627E-15 -5.081450268675135E-14 8.87699490113253E-16
q -7.042273020306417E-15 1.98518932621434E-14 1.503435168078117E-12 8.550381964816358E-15 1.764554038042776E-13 -2.334690523322242E-15
tp -4.838985119958265E-13 1.503435168078117E-12 3.786537828198756E-8 1.615366453549972E-11 8.022329734768267E-9 2.396995183401504E-12
node -1.632441128376627E-15 8.550381964816358E-15 1.615366453549972E-11 3.718344271266448E-9 -3.700200506792799E-9 1.357393678624181E-11
peri -5.081450268675135E-14 1.764554038042776E-13 8.022329734768267E-9 -3.700200506792799E-9 5.404984458377762E-9 -1.302145753059726E-11
i 8.87699490113253E-16 -2.334690523322242E-15 2.396995183401504E-12 1.357393678624181E-11 -1.302145753059726E-11 3.07696564718673E-11

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 15.4   n/a MPO436150  
diameter diameter 4.406 km 0.489 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.052   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

52248 (1981 EE15)          Discovered 1981-Mar-01 by Bus, S. J. at Siding Spring
Reference: 20030216/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1981 EE15 = 1998 WH27 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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