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27678 (1981 EX3)
Classification: Main-belt Asteroid          SPK-ID: 2027678
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .096656306277531 3.4191e-08  
a 2.746151578886258 1.251e-08 au
q 2.480718710792902 9.5259e-08 au
i 7.928641746279549 3.9136e-06 deg
node 233.6907996122147 2.809e-05 deg
peri 237.8497409897165 3.5456e-05 deg
M 276.537638396786 2.1535e-05 deg
tp 2459385.865962652809
(2021-Jun-20.36596265)
0.00010006 TDB
period 1662.207297878196
4.55
1.1358e-05
3.11e-08
d
yr
n .2165794846765137 1.4799e-09 deg/d
Q 3.011584446979613 1.3719e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1183  
   data-arc span      15870 days (43.45 yr)  
   first obs. used      1977-05-18  
   last obs. used      2020-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50149  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:21:53  

Additional Information
 Earth MOID = 1.50813 au 
 Jupiter MOID = 2.1543 au 
 T_jup = 3.327 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457159.5 (2015-May-17.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0943604563070915 3.3997e-08  
q 2.488871649629419 9.4514e-08 au
tp 2457719.553690627787
(2016-Nov-27.05369063)
0.00010134 TDB
node 233.7293122937302 2.8106e-05 deg
peri 237.208336426901 3.5912e-05 deg
i 7.922394892107096 3.9136e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1183  
   data-arc span      15870 days (43.45 yr)  
   first obs. used      1977-05-18  
   last obs. used      2020-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50149  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:21:53  

Additional Information
 Jupiter MOID = 2.1543 au 
 T_jup = 3.327 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.155766791890415E-15 -3.189674664157325E-15 3.615134139486004E-13 2.491580829160041E-15 1.075009028353482E-13 -6.133162491639261E-16
q -3.189674664157325E-15 8.932807785665032E-15 -8.33299229606262E-13 -6.499178875952824E-15 -2.722451553257766E-13 1.716164034679367E-15
tp 3.615134139486004E-13 -8.33299229606262E-13 1.026961878741292E-8 9.381890347481051E-12 2.278992852811535E-9 6.83164080661901E-13
node 2.491580829160041E-15 -6.499178875952824E-15 9.381890347481051E-12 7.899461432836467E-10 -7.800175875613762E-10 -1.607914085713545E-11
peri 1.075009028353482E-13 -2.722451553257766E-13 2.278992852811535E-9 -7.800175875613762E-10 1.289671278783309E-9 1.603663485079207E-11
i -6.133162491639261E-16 1.716164034679367E-15 6.83164080661901E-13 -1.607914085713545E-11 1.603663485079207E-11 1.531598368062687E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.5   n/a MPO395272  
diameter diameter 4.337 km 0.316 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.196   0.068 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

27678 (1981 EX3)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20010902/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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