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71728 (2000 HE64)
Classification: Main-belt Asteroid          SPK-ID: 2071728
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2477522038093706 3.9762e-08  
a 3.059359121334277 2.1116e-08 au
q 2.30139615677941 1.2384e-07 au
i 6.376563647722518 4.3854e-06 deg
node 285.2870423109412 5.956e-05 deg
peri 192.6670642436176 6.1163e-05 deg
M 332.3824332140138 1.5394e-05 deg
tp 2459150.443287374700
(2020-Oct-27.94328737)
8.4475e-05 TDB
period 1954.537989287404
5.35
2.0236e-05
5.54e-08
d
yr
n .184186750000828 1.907e-09 deg/d
Q 3.817322085889144 2.6348e-08 au
  Orbit Determination Parameters
   # obs. used (total)      981  
   data-arc span      15305 days (41.90 yr)  
   first obs. used      1978-03-05  
   last obs. used      2020-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57401  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 16:30:36  

Additional Information
 Earth MOID = 1.31813 au 
 Jupiter MOID = 1.30978 au 
 T_jup = 3.177 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456854.5 (2014-Jul-16.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2471961663960295 4.0171e-08  
q 2.302567683822888 1.2513e-07 au
tp 2457199.430723356838
(2015-Jun-25.93072336)
7.4571e-05 TDB
node 285.3745601017667 5.9529e-05 deg
peri 193.0602303034544 6.1117e-05 deg
i 6.378258945703387 4.3865e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      981  
   data-arc span      15305 days (41.90 yr)  
   first obs. used      1978-03-05  
   last obs. used      2020-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57401  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 16:30:36  

Additional Information
 Jupiter MOID = 1.30978 au 
 T_jup = 3.177 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.613676336855872E-15 -4.986578342470371E-15 3.904164465420209E-13 -1.035180924331781E-14 1.588476390313168E-13 9.288980201495715E-17
q -4.986578342470371E-15 1.56583207443507E-14 -7.702961402749648E-13 3.707899910810092E-14 -4.21789684292415E-13 4.510246397319155E-16
tp 3.904164465420209E-13 -7.702961402749648E-13 5.560865674326983E-9 1.408924885165489E-11 1.100081928777134E-9 3.265275275508069E-12
node -1.035180924331781E-14 3.707899910810092E-14 1.408924885165489E-11 3.543683363944498E-9 -3.5189010659624E-9 1.841622906667976E-12
peri 1.588476390313168E-13 -4.21789684292415E-13 1.100081928777134E-9 -3.5189010659624E-9 3.735333123240418E-9 -1.203955847615884E-12
i 9.288980201495715E-17 4.510246397319155E-16 3.265275275508069E-12 1.841622906667976E-12 -1.203955847615884E-12 1.924129966931291E-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 14.2   n/a MPO453125  
diameter diameter 4.676 km 0.144 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.140   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

71728 (2000 HE64)          Discovered 2000-Apr-26 by LONEOS at Anderson Mesa
Reference: 20031109/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 2000 HE64 = 1978 EK7 = 1998 XT64 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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