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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 | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .157863159629254 4.0118e-08  
a 2.366452122720804 7.9771e-09 au
q 1.992876513516743 9.5929e-08 au
i .3029754299515874 3.7997e-06 deg
node 156.6751748631134 0.00079778 deg
peri 57.61535163468693 0.00079785 deg
M 308.7137154506224 1.1521e-05 deg
tp 2459389.927813898800
(2021-Jun-24.42781390)
4.2846e-05 TDB
period 1329.673490734385
3.64
6.7233e-06
1.841e-08
d
yr
n .2707431580072866 1.369e-09 deg/d
Q 2.740027731924866 9.2364e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1088  
   data-arc span      14645 days (40.10 yr)  
   first obs. used      1981-02-09  
   last obs. used      2021-03-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53111  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:26:26  

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 | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.6   n/a MPO449085  
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

[ show close-approach data ]
Alternate Designations
 1981 EX27 = 1997 RN10 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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