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31321 (1998 HD3)
Classification: Main-belt Asteroid          SPK-ID: 2031321
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.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08400030830770809 4.4985e-08  
a 3.19829507044988 1.9728e-08 au
q 2.929637298473067 1.4766e-07 au
i 5.890811266112606 4.1702e-06 deg
node 38.25841243925066 4.2756e-05 deg
peri 132.4837752179385 4.9459e-05 deg
M 353.1839549601656 2.3373e-05 deg
tp 2459040.055435526135
(2020-Jul-09.55543553)
0.00013564 TDB
period 2089.181733129281
5.72
1.933e-05
5.292e-08
d
yr
n .1723162682744569 1.5943e-09 deg/d
Q 3.466952842426693 2.1385e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1253  
   data-arc span      21758 days (59.57 yr)  
   first obs. used      1960-10-17  
   last obs. used      2020-05-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54094  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:01:42  

Additional Information
 Earth MOID = 1.93894 au 
 Jupiter MOID = 1.50585 au 
 T_jup = 3.181 
[ 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 14.0   n/a MPO296380  

31321 (1998 HD3)          Discovered 1998-Apr-21 by Klet at Klet
Reference: 20011130/Numbers.arcLast Updated: 2004-04-19

[ hide close-approach data ]
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
1903-Mar-02 03:33 00:03 Jupiter 1.65040867669163 1.65040746017556 1.65040989321191 2.25298807960223 2.01234081601091 2416175.648011323 2.99771824753195 169.847684191634 20.8125688540571 -79.3691060966138 2630549.55809622 T 28 CATAB v2.0f-lin.ifort 2020-Nov-13 01:01:45 2020-Nov-13 01:01
1914-Mar-10 14:08 00:03 Jupiter 1.85190028136401 1.85189892790381 1.85190163482421 2.78717434702562 2.61793438542673 2420202.088995577 2.70479206526966 78.8405691688797 27.9400040838307 -62.672835427388 1946066.06592179 T 28 CATAB v2.0f-lin.ifort 2020-Nov-13 01:01:45 2020-Nov-13 01:01
2024-Aug-26 01:30 < 00:01 Jupiter 1.82193308495501 1.82193262540971 1.8219335445003 3.05773941113924 2.90171740742463 2460548.562443144 0.369295583136492 51.1756483167859 13.0969314218529 -77.4115501180225 3151996.94165721 T 28 CATAB v2.0f-lin.ifort 2020-Nov-13 01:01:45 2020-Nov-13 01:01
2035-Sep-10 05:14 < 00:01 Jupiter 1.61831151099705 1.61831100859424 1.61831201340015 2.56191918802873 2.34875117090818 2464580.717874526 0.705576087940988 77.2993908993492 9.23963308483047 -79.9166890614725 2411458.07556371 T 28 CATAB v2.0f-lin.ifort 2020-Nov-13 01:01:45 2020-Nov-13 01:01
2046-Oct-11 07:05 00:01 Jupiter 1.53425942779409 1.53425898672555 1.53425986886315 2.32961603020852 2.07917429445238 2468629.795080897 1.09505449059563 111.276398471163 16.0165819150732 -83.7566594493535 2204949.89262468 T 28 CATAB v2.0f-lin.ifort 2020-Nov-13 01:01:45 2020-Nov-13 01:01
2057-Nov-13 14:25 00:02 Jupiter 1.59600959294176 1.59600892295074 1.59601026293477 2.30847040869639 2.0658195186353 2472681.100863958 1.59996719967025 132.412387183425 21.9601005898973 -82.0078680751664 2515084.07445204 T 28 CATAB v2.0f-lin.ifort 2020-Nov-13 01:01:45 2020-Nov-13 01:01
2068-Nov-28 13:17 00:02 Jupiter 1.77253120021342 1.77253005551884 1.7725323449084 2.64091388838049 2.45330497743094 2476714.053248733 2.14628409816629 83.1127075265006 25.6050581576656 -67.62118963926 2519666.73614261 T 28 CATAB v2.0f-lin.ifort 2020-Nov-13 01:01:45 2020-Nov-13 01:01
2179-May-09 15:17 00:05 Jupiter 1.90111781079887 1.90111497175006 1.9011206498478 3.14876224046815 3.00393495923918 2517052.136811386 5.17800233563028 148.132128398972 29.2365671961635 -40.9925155752238 1431121.73597305 T 28 CATAB v2.0f-lin.ifort 2020-Nov-13 01:01:45 2020-Nov-13 01:01
2190-May-17 23:00 00:05 Jupiter 1.67414539114717 1.67414296123577 1.67414782106181 2.57936944598576 2.37513374189319 2521078.458258012 5.31883506584419 179.633208843084 20.8438746823451 -61.1967227702284 1781253.67261277 T 28 CATAB v2.0f-lin.ifort 2020-Nov-13 01:01:45 2020-Nov-13 01:01

Alternate Designations
 1998 HD3 = 1981 JY4 = 2000 SN32 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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