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48178 (2001 HU31)
Classification: Main-belt Asteroid          SPK-ID: 2048178
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03335623697201206 4.4963e-08  
a 2.692025977274631 1.6696e-08 au
q 2.602230120841846 1.2113e-07 au
i 21.30537934937744 5.252e-06 deg
node 229.3743866908335 1.1223e-05 deg
peri 231.0919537361848 6.9469e-05 deg
M 248.9894597487088 6.9076e-05 deg
tp 2459497.983878935880
(2021-Oct-10.48387894)
0.0003103 TDB
period 1613.308033737219
4.42
1.5009e-05
4.109e-08
d
yr
n .223143995115466 2.0759e-09 deg/d
Q 2.781821833707416 1.7253e-08 au
  Orbit Determination Parameters
   # obs. used (total)      947  
   data-arc span      7598 days (20.80 yr)  
   first obs. used      1998-10-29  
   last obs. used      2019-08-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48259  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 09:01:29  

Additional Information
 Earth MOID = 1.63858 au 
 Jupiter MOID = 2.3525 au 
 T_jup = 3.272 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456754.5 (2014-Apr-07.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03312840792686009 4.5446e-08  
q 2.602947121874282 1.226e-07 au
tp 2456253.118938377127
(2012-Nov-21.61893838)
0.00030488 TDB
node 229.4342059038865 1.1208e-05 deg
peri 227.3075666760853 6.9103e-05 deg
i 21.31989851442116 5.2545e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      947  
   data-arc span      7598 days (20.80 yr)  
   first obs. used      1998-10-29  
   last obs. used      2019-08-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48259  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 09:01:29  

Additional Information
 Jupiter MOID = 2.3525 au 
 T_jup = 3.272 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.065351406641669E-15 -5.523722085084859E-15 -3.302840494285563E-12 -5.122579846576752E-15 -7.763869468518488E-13 2.034850921445734E-15
q -5.523722085084859E-15 1.503083806547338E-14 9.370573282453281E-12 1.255407300476451E-14 2.211899485368357E-12 -4.90230975148461E-15
tp -3.302840494285563E-12 9.370573282453281E-12 9.295320974473918E-8 -6.483041555009346E-12 2.080044432356346E-8 -2.160302211050405E-11
node -5.122579846576752E-15 1.255407300476451E-14 -6.483041555009346E-12 1.256263673742708E-10 -1.180975936016488E-10 8.511744116485645E-12
peri -7.763869468518488E-13 2.211899485368357E-12 2.080044432356346E-8 -1.180975936016488E-10 4.775218315437887E-9 -1.275666302698115E-11
i 2.034850921445734E-15 -4.90230975148461E-15 -2.160302211050405E-11 8.511744116485645E-12 -1.275666302698115E-11 2.760999995250335E-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 14.1   n/a MPO436119  
diameter diameter 4.256 km 0.333 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.245   0.046 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

48178 (2001 HU31)          Discovered 2001-Apr-28 by Yeung, W. K. Y. at Desert Beaver
Reference: 20020921/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 2001 HU31 = 1999 AZ29 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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