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JPL Small-Body Database Browser
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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 
[ show covariance matrix ]

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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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1934-Oct-17 09:07 < 00:01 Thisb 0.0286151028431681 0.0285990814882292 0.0286311256107163 6.55447192089123 6.55447188453811 2427727.880173218 0.972679611430673 859.540573663274 42.4995236839714 -21.6990661613354 37517.1615989553 T 25 CATAB v2.0f-lin.ifort 2020-Feb-23 09:01:44 2020-Feb-23 09:01
2056-May-20 10:25 < 00:01 Thisb 0.0158935655571588 0.0158822927647987 0.0159048385610977 6.73475089898623 6.73475083528733 2472138.934270743 0.722253107489183 569.450223246275 42.0262601144131 9.28942010890856 10014.5680914064 T 25 CATAB v2.0f-lin.ifort 2020-Feb-23 09:01:44 2020-Feb-23 09:01
2151-Apr-25 10:48 00:02 Thisb 0.0376764152386424 0.03765554509078 0.0376972999214909 6.7083332110829 6.70833318410609 2506810.950226128 2.25146635165457 1564.28093878412 42.85781706452 -48.310657448692 98215.3905817363 T 25 CATAB v2.0f-lin.ifort 2020-Feb-23 09:01:44 2020-Feb-23 09:01

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