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46778 (1998 HR51)
Classification: Main-belt Asteroid          SPK-ID: 2046778
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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1216514510025541 3.2563e-08  
a 2.166104633282553 6.3032e-09 au
q 1.902594861620375 7.2173e-08 au
i 2.890960432907503 2.9541e-06 deg
node 82.10212011417541 6.8805e-05 deg
peri 167.6765896457548 7.031e-05 deg
M 298.3897768315954 1.5895e-05 deg
tp 2459199.781899899181
(2020-Dec-16.28189990)
5.1767e-05 TDB
period 1164.44122865142
3.19
5.0827e-06
1.392e-08
d
yr
n .3091611591397605 1.3495e-09 deg/d
Q 2.429614404944731 7.07e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1676  
   data-arc span      8073 days (22.10 yr)  
   first obs. used      1998-03-22  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4716  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 09:35:18  

Additional Information
 Earth MOID = .888564 au 
 Jupiter MOID = 2.58976 au 
 T_jup = 3.681 
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Orbital Elements at Epoch 2456974.5 (2014-Nov-13.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1217978007495188 3.2498e-08  
q 1.902468856165826 7.2035e-08 au
tp 2456870.769281008896
(2014-Aug-01.26928101)
4.8488e-05 TDB
node 82.1230405944316 6.8815e-05 deg
peri 167.7065800198358 7.0322e-05 deg
i 2.890859208226863 2.9536e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1676  
   data-arc span      8073 days (22.10 yr)  
   first obs. used      1998-03-22  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4716  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 09:35:18  

Additional Information
 Jupiter MOID = 2.58976 au 
 T_jup = 3.681 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.056144247531291E-15 -2.334612153089616E-15 -6.056703054030374E-13 -5.788868700421346E-15 -1.406785786842783E-13 -5.325898696025567E-16
q -2.334612153089616E-15 5.189066152017766E-15 1.37366204401052E-12 1.247131323008523E-14 3.217320664693725E-13 1.249299607989362E-15
tp -6.056703054030374E-13 1.37366204401052E-12 2.351071472134358E-9 -3.059463642559241E-12 7.108371799317136E-10 1.832086269617947E-12
node -5.788868700421346E-15 1.247131323008523E-14 -3.059463642559241E-12 4.735520299971488E-9 -4.730509948299604E-9 -3.995451693731196E-11
peri -1.406785786842783E-13 3.217320664693725E-13 7.108371799317136E-10 -4.730509948299604E-9 4.945208076524746E-9 4.04490240837301E-11
i -5.325898696025567E-16 1.249299607989362E-15 1.832086269617947E-12 -3.995451693731196E-11 4.04490240837301E-11 8.723522159067311E-12

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 15.3   n/a MPO502467  
diameter diameter 2.177 km 0.496 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.258   0.238 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

46778 (1998 HR51)          Discovered 1998-Apr-30 by LONEOS at Anderson Mesa
Reference: 20020921/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1998 HR51 = 1999 TD17 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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