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18314 (1981 EX27)
Classification: Main-belt Asteroid          SPK-ID: 2018314
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1578631588494944 3.9822e-08  
a 2.366452122412506 7.7333e-09 au
q 1.992876515102377 9.5422e-08 au
i .302975534072262 3.7961e-06 deg
node 156.6750626981553 0.00077794 deg
peri 57.61546351748327 0.00077801 deg
M 308.7137159111535 1.1152e-05 deg
tp 2459389.927812160793
(2021-Jun-24.42781216)
4.1432e-05 TDB
period 1329.673490474544
3.64
6.5179e-06
1.785e-08
d
yr
n .2707431580601946 1.3271e-09 deg/d
Q 2.740027729722635 8.9541e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1139  
   data-arc span      14652 days (40.11 yr)  
   first obs. used      1981-02-09  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5206  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:42:30  

Additional Information
 Earth MOID = .985358 au 
 Jupiter MOID = 2.22537 au 
 T_jup = 3.531 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.68   n/a MPCxxxxx  
diameter diameter 1.914 km 0.300 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.304   0.154 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18314 (1981 EX27)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1981 EX27 = 1997 RN10 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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