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48404 (1981 EQ41)
Classification: Main-belt Asteroid          SPK-ID: 2048404
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1024165700468225 4.4867e-08  
a 2.803101157789676 1.6202e-08 au
q 2.51601715171458 1.2563e-07 au
i 4.879709755301629 5.5356e-06 deg
node 338.0740454430202 5.1034e-05 deg
peri 62.84176633592284 5.7118e-05 deg
M 174.9197227253932 2.5208e-05 deg
tp 2457767.599999157493
(2017-Jan-14.09999916)
0.00011843 TDB
period 1714.180628870697
4.69
1.4862e-05
4.069e-08
d
yr
n .2100128737524984 1.8209e-09 deg/d
Q 3.090185163864771 1.7862e-08 au
  Orbit Determination Parameters
   # obs. used (total)      925  
   data-arc span      13967 days (38.24 yr)  
   first obs. used      1981-02-12  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54735  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 04:38:03  

Additional Information
 Earth MOID = 1.52782 au 
 Jupiter MOID = 2.29244 au 
 T_jup = 3.311 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456506.5 (2013-Aug-02.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1038446914236526 4.4771e-08  
q 2.51086392657345 1.2545e-07 au
tp 2456056.813134996915
(2012-May-09.31313500)
0.00011519 TDB
node 338.1088273939599 5.1023e-05 deg
peri 63.25694769234991 5.6958e-05 deg
i 4.881415138048619 5.5372e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      925  
   data-arc span      13967 days (38.24 yr)  
   first obs. used      1981-02-12  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54735  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 04:38:03  

Additional Information
 Jupiter MOID = 2.29244 au 
 T_jup = 3.311 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.004411528531783E-15 -5.578149208214605E-15 -1.55173873749097E-12 7.915918384241071E-15 -3.817963609048059E-13 -8.355181101842875E-17
q -5.578149208214605E-15 1.573826234652659E-14 4.413646880617119E-12 -2.250340802129406E-14 1.09341903658237E-12 6.343972262635552E-16
tp -1.55173873749097E-12 4.413646880617119E-12 1.326966366860765E-8 -3.739060446944436E-11 2.932162973361806E-9 -1.594163486663422E-12
node 7.915918384241071E-15 -2.250340802129406E-14 -3.739060446944436E-11 2.603332629299204E-9 -2.601425684975017E-9 4.305827649802898E-11
peri -3.817963609048059E-13 1.09341903658237E-12 2.932162973361806E-9 -2.601425684975017E-9 3.244163373093464E-9 -4.318869654820974E-11
i -8.355181101842875E-17 6.343972262635552E-16 -1.594163486663422E-12 4.305827649802898E-11 -4.318869654820974E-11 3.066016275729688E-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 14.4   n/a MPO436121  
diameter diameter 9.054 km 0.329 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.049   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

48404 (1981 EQ41)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20021120/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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