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46788 (1998 HP139)
Classification: Main-belt Asteroid          SPK-ID: 2046788
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .076431002126037 3e-08  
a 2.196782077312017 6.9291e-09 au
q 2.028879821690542 6.5425e-08 au
i 3.628574808425931 4.2314e-06 deg
node 340.1689538402183 5.0311e-05 deg
peri 233.5463698201425 5.8116e-05 deg
M 279.8147991230243 2.9646e-05 deg
tp 2459265.393079742533
(2021-Feb-19.89307974)
9.8183e-05 TDB
period 1189.265695718847
3.26
5.6268e-06
1.541e-08
d
yr
n .3027077980100985 1.4322e-09 deg/d
Q 2.364684332933492 7.4587e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1635  
   data-arc span      7980 days (21.85 yr)  
   first obs. used      1998-03-25  
   last obs. used      2020-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50425  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 08:34:49  

Additional Information
 Earth MOID = 1.02508 au 
 Jupiter MOID = 2.60618 au 
 T_jup = 3.662 
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Orbital Elements at Epoch 2456641.5 (2013-Dec-15.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07642748719471479 3.0029e-08  
q 2.029007453529918 6.5461e-08 au
tp 2456887.075455653043
(2014-Aug-17.57545565)
9.6551e-05 TDB
node 340.2228630383307 5.0289e-05 deg
peri 233.4912533147152 5.8088e-05 deg
i 3.629729416774292 4.2318e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1635  
   data-arc span      7980 days (21.85 yr)  
   first obs. used      1998-03-25  
   last obs. used      2020-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50425  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 08:34:49  

Additional Information
 Jupiter MOID = 2.60618 au 
 T_jup = 3.662 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.017598081318412E-16 -1.956474883041527E-15 -7.848897225662372E-13 2.428532757796594E-15 -2.329312267326941E-13 3.671049523114111E-16
q -1.956474883041527E-15 4.285132198264712E-15 1.781978131179772E-12 -5.674420961403757E-15 5.262144923905148E-13 -8.498824413766046E-16
tp -7.848897225662372E-13 1.781978131179772E-12 9.322032007923246E-9 -1.839296682302047E-11 2.814291426452209E-9 -4.011262136560332E-13
node 2.428532757796594E-15 -5.674420961403757E-15 -1.839296682302047E-11 2.528974168419183E-9 -2.52876080729095E-9 -2.565722294167689E-11
peri -2.329312267326941E-13 5.262144923905148E-13 2.814291426452209E-9 -2.52876080729095E-9 3.374249500577908E-9 2.549526857552347E-11
i 3.671049523114111E-16 -8.498824413766046E-16 -4.011262136560332E-13 -2.565722294167689E-11 2.549526857552347E-11 1.790773649189682E-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 14.8   n/a MPO347848  
diameter diameter 2.336 km 0.541 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.468   0.236 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

46788 (1998 HP139)          Discovered 1998-Apr-21 by LINEAR at Socorro
Reference: 20020921/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 HP139 = 1985 DG2 = 1999 UB17 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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