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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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07643100289231182 3.0092e-08  
a 2.196782077474179 6.9474e-09 au
q 2.028879820156972 6.5593e-08 au
i 3.628574535732711 4.2533e-06 deg
node 340.1689534324112 5.0315e-05 deg
peri 233.5463694464689 5.817e-05 deg
M 279.8147997772874 2.9716e-05 deg
tp 2459265.393077610496
(2021-Feb-19.89307761)		 9.8406e-05 TDB
period 1189.265695850532
3.26		 5.6416e-06
1.545e-08		 d
yr
n .3027077979765804 1.436e-09 deg/d
Q 2.364684334791387 7.4784e-09 au
   Orbit Determination Parameters
   # obs. used (total)      1619  
   data-arc span      7955 days (21.78 yr)  
   first obs. used      1998-03-25  
   last obs. used      2020-01-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50599  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 07:12:01  

Additional Information
 Earth MOID = 1.02508 au 
 Jupiter MOID = 2.60618 au 
 T_jup = 3.662 
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[ 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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