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17765 (1998 EZ2)
Classification: Main-belt Asteroid          SPK-ID: 2017765
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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1677499289512 6.1686e-08  
a 2.516933850102614 1.2579e-08 au
q 2.09471837557303 1.5663e-07 au
i 6.330732278674922 3.985e-06 deg
node 43.69325674719666 6.2052e-05 deg
peri 243.0917051929984 6.3596e-05 deg
M 87.81274351182701 1.4427e-05 deg
tp 2458644.736675818996
(2019-Jun-10.23667582)
5.8864e-05 TDB
period 1458.498978430297
3.99
1.0934e-05
2.994e-08
d
yr
n .2468291067213831 1.8504e-09 deg/d
Q 2.939149324632197 1.4689e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1535  
   data-arc span      25462 days (69.71 yr)  
   first obs. used      1950-03-21  
   last obs. used      2019-12-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48729  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 00:22:25  

Additional Information
 Earth MOID = 1.08764 au 
 Jupiter MOID = 2.2367 au 
 T_jup = 3.430 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456715.5 (2014-Feb-27.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1673823559262053 6.1645e-08  
q 2.095964330080643 1.5656e-07 au
tp 2457187.396881045042
(2015-Jun-13.89688104)
6.1913e-05 TDB
node 43.71660700229324 6.2018e-05 deg
peri 243.3966333592428 6.3553e-05 deg
i 6.332487468001767 3.986e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1535  
   data-arc span      25462 days (69.71 yr)  
   first obs. used      1950-03-21  
   last obs. used      2019-12-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48729  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 00:22:25  

Additional Information
 Jupiter MOID = 2.2367 au 
 T_jup = 3.430 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.800155051732771E-15 -9.629554182509845E-15 1.960995422449564E-12 5.649040208576808E-14 4.647826832567195E-13 -5.140751952429499E-15
q -9.629554182509845E-15 2.45121561561811E-14 -5.171020439013159E-12 -1.500929266115345E-13 -1.228769205945482E-12 1.331595522302979E-14
tp 1.960995422449564E-12 -5.171020439013159E-12 3.833241480009311E-9 6.552800469347634E-11 9.328469738011907E-10 -2.616731456598675E-12
node 5.649040208576808E-14 -1.500929266115345E-13 6.552800469347634E-11 3.846250628492899E-9 -3.80607430040917E-9 -3.383865969809182E-11
peri 4.647826832567195E-13 -1.228769205945482E-12 9.328469738011907E-10 -3.80607430040917E-9 4.038945302502993E-9 3.293048403897574E-11
i -5.140751952429499E-15 1.331595522302979E-14 -2.616731456598675E-12 -3.383865969809182E-11 3.293048403897574E-11 1.588828666850942E-11

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 13.8   n/a MPO502304  
diameter diameter 4.938 km 0.112 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.166   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

17765 (1998 EZ2)          Discovered 1998-Mar-01 by Beijing Schmidt CCD Asteroid Program at Xinglong
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 EZ2 = 1987 MX 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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