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JPL Small-Body Database Browser
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19933 (1981 EW5)
Classification: Main-belt Asteroid          SPK-ID: 2019933
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1502590397110423 5.3198e-08  
a 2.551878938120936 1.4547e-08 au
q 2.16843605942005 1.3224e-07 au
i 12.61272123071496 5.4335e-06 deg
node 223.6974258255946 2.2056e-05 deg
peri 190.5503584370519 2.7175e-05 deg
M 329.0045084364242 1.7416e-05 deg
tp 2459128.698975821336
(2020-Oct-06.19897582)
7.223e-05 TDB
period 1488.978847166137
4.08
1.2732e-05
3.486e-08
d
yr
n .2417764367070502 2.0674e-09 deg/d
Q 2.935321816821822 1.6733e-08 au
  Orbit Determination Parameters
   # obs. used (total)      950  
   data-arc span      13977 days (38.27 yr)  
   first obs. used      1981-02-02  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51152  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:47:30  

Additional Information
 Earth MOID = 1.18043 au 
 Jupiter MOID = 2.44254 au 
 T_jup = 3.390 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456031.5 (2012-Apr-14.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1515593584213005 5.3296e-08  
q 2.165351723174936 1.3274e-07 au
tp 2456146.639646950674
(2012-Aug-07.13964695)
7.0558e-05 TDB
node 223.7735513647972 2.2007e-05 deg
peri 189.9007632389623 2.7033e-05 deg
i 12.62594533360421 5.4382e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      950  
   data-arc span      13977 days (38.27 yr)  
   first obs. used      1981-02-02  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51152  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:47:30  

Additional Information
 Jupiter MOID = 2.44254 au 
 T_jup = 3.390 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.840493352632246E-15 -7.047364840777323E-15 6.61746125256172E-13 1.793921862911759E-14 9.489781557086405E-14 -5.407114726478271E-15
q -7.047364840777323E-15 1.76193008883482E-14 -1.832309033722131E-12 -4.729923993993903E-14 -2.776703942351775E-13 1.361901679208216E-14
tp 6.61746125256172E-13 -1.832309033722131E-12 4.978413299150582E-9 2.363392927169516E-11 1.129015105216726E-9 1.389785589418728E-12
node 1.793921862911759E-14 -4.729923993993903E-14 2.363392927169516E-11 4.843260734396106E-10 -4.669996822315646E-10 1.847663619840029E-11
peri 9.489781557086405E-14 -2.776703942351775E-13 1.129015105216726E-9 -4.669996822315646E-10 7.307597949378948E-10 -1.772199392975458E-11
i -5.407114726478271E-15 1.361901679208216E-14 1.389785589418728E-12 1.847663619840029E-11 -1.772199392975458E-11 2.957414826101479E-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 14.0   n/a MPO474028  
diameter diameter 9.534 km 0.204 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.059   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19933 (1981 EW5)          Discovered 1981-Mar-07 by Bus, S. J. at Siding Spring
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

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