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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2157738496757074 2.9168e-08  
a 2.316534612566401 7.0999e-09 au
q 1.816687021305926 6.7909e-08 au
i 4.074463182717026 3.5889e-06 deg
node 28.76036384055956 4.6457e-05 deg
peri 291.5958714866999 4.7129e-05 deg
M 274.6788134755806 1.0008e-05 deg
tp 2459305.718604861251
(2021-Apr-01.21860486)
3.6532e-05 TDB
period 1287.82430514609
3.53
5.9205e-06
1.621e-08
d
yr
n .2795412375441709 1.2851e-09 deg/d
Q 2.816382203826877 8.6318e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1670  
   data-arc span      16281 days (44.57 yr)  
   first obs. used      1975-09-30  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5218  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 04:47:38  

Additional Information
 Earth MOID = .808931 au 
 Jupiter MOID = 2.51028 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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