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18315 (1981 ED37)
Classification: Main-belt Asteroid          SPK-ID: 2018315
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2158999323568711 2.8467e-08  
a 2.317026026633002 6.8956e-09 au
q 1.816780264213827 6.6568e-08 au
i 4.074161680156058 3.5787e-06 deg
node 28.75578584976896 4.4541e-05 deg
peri 291.5586095770441 4.5252e-05 deg
M 330.6268537038923 1.0132e-05 deg
tp 2459305.609691801966
(2021-Apr-01.10969180)
3.6508e-05 TDB
period 1288.234112452641
3.53
5.7508e-06
1.574e-08
d
yr
n .2794523111289173 1.2475e-09 deg/d
Q 2.817271789052177 8.3843e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1766  
   data-arc span      16363 days (44.80 yr)  
   first obs. used      1975-09-30  
   last obs. used      2020-07-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51572  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:26:26  

Additional Information
 Earth MOID = .807065 au 
 Jupiter MOID = 2.50913 au 
 T_jup = 3.546 
[ 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 14.8   n/a MPO467907  
diameter diameter 2.965 km 0.073 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.241   0.038 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18315 (1981 ED37)          Discovered 1981-Mar-11 by Bus, S. J. at Siding Spring
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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