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27688 (1981 EX23)
Classification: Main-belt Asteroid          SPK-ID: 2027688
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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09303631091199709 3.3632e-08  
a 2.77551375097737 1.6825e-08 au
q 2.517290190700916 9.5021e-08 au
i 2.315938933505984 4.3655e-06 deg
node 253.9117793383903 0.00011344 deg
peri 36.12928712298596 0.00011695 deg
M 64.60050184627883 2.8153e-05 deg
tp 2458697.427247729257
(2019-Aug-01.92724773)
0.00013177 TDB
period 1688.937201712349
4.62
1.5357e-05
4.205e-08
d
yr
n .2131517972574763 1.9382e-09 deg/d
Q 3.033737311253824 1.839e-08 au
  Orbit Determination Parameters
   # obs. used (total)      885  
   data-arc span      15778 days (43.20 yr)  
   first obs. used      1977-05-18  
   last obs. used      2020-07-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5504  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 02:30:13  

Additional Information
 Earth MOID = 1.50146 au 
 Jupiter MOID = 2.09813 au 
 T_jup = 3.328 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456609.5 (2013-Nov-13.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09344966004865994 3.3357e-08  
q 2.51620466651814 9.4412e-08 au
tp 2457013.935692371569
(2014-Dec-22.43569237)
0.00013151 TDB
node 253.9628810880908 0.00011356 deg
peri 37.5124271257412 0.00011708 deg
i 2.314089565444794 4.3664e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      885  
   data-arc span      15778 days (43.20 yr)  
   first obs. used      1977-05-18  
   last obs. used      2020-07-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5504  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 02:30:13  

Additional Information
 Jupiter MOID = 2.09813 au 
 T_jup = 3.328 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.112714307807039E-15 -3.107808018667985E-15 -5.005565288516535E-14 -2.520501146565631E-15 -3.513198485049054E-14 -7.531997734164494E-17
q -3.107808018667985E-15 8.913648263278423E-15 6.588452698473889E-14 9.811616073346367E-15 6.310989838482984E-14 2.881468199615495E-16
tp -5.005565288516535E-14 6.588452698473889E-14 1.729466623486946E-8 -1.161762167220308E-11 3.772539466395413E-9 -2.033934952196025E-12
node -2.520501146565631E-15 9.811616073346367E-15 -1.161762167220308E-11 1.289593242860943E-8 -1.288754540843427E-8 -1.562299552117737E-10
peri -3.513198485049054E-14 6.310989838482984E-14 3.772539466395413E-9 -1.288754540843427E-8 1.370825457618605E-8 1.556495780514245E-10
i -7.531997734164494E-17 2.881468199615495E-16 -2.033934952196025E-12 -1.562299552117737E-10 1.556495780514245E-10 1.906540530718312E-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 14.9   n/a MPO474127  
diameter diameter 2.781 km 0.436 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.301   0.140 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

27688 (1981 EX23)          Discovered 1981-Mar-07 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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