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58876 (1998 HT121)
Classification: Main-belt Asteroid          SPK-ID: 2058876
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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0909032093737685 3.8252e-08  
a 3.012138931997963 1.675e-08 au
q 2.738325835999673 1.2068e-07 au
i 10.50822160739872 3.9662e-06 deg
node 145.6273095632065 1.7479e-05 deg
peri 173.3887258277523 3.0812e-05 deg
M 28.45858847809564 2.2435e-05 deg
tp 2459049.553940237417
(2020-Jul-19.05394024)
0.00011947 TDB
period 1909.461586837154
5.23
1.5927e-05
4.361e-08
d
yr
n .1885348217956595 1.5726e-09 deg/d
Q 3.285952027996254 1.8272e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1073  
   data-arc span      10498 days (28.74 yr)  
   first obs. used      1992-02-29  
   last obs. used      2020-11-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54085  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 05:44:49  

Additional Information
 Earth MOID = 1.72376 au 
 Jupiter MOID = 2.0315 au 
 T_jup = 3.217 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457521.5 (2016-May-13.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09221807701622986 3.8575e-08  
q 2.734797373729525 1.2226e-07 au
tp 2457148.001546571494
(2015-May-05.50154657)
0.00012394 TDB
node 145.7498242727913 1.7516e-05 deg
peri 174.9382721236595 3.0394e-05 deg
i 10.49646951042708 3.9626e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1073  
   data-arc span      10498 days (28.74 yr)  
   first obs. used      1992-02-29  
   last obs. used      2020-11-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54085  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 05:44:49  

Additional Information
 Jupiter MOID = 2.0315 au 
 T_jup = 3.217 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.488002197434904E-15 -4.6828305089125E-15 2.183493329538791E-12 -4.990431570995605E-16 4.567339212633797E-13 -1.335211887051631E-16
q -4.6828305089125E-15 1.494838930088065E-14 -7.55550420145925E-12 1.004186097763512E-16 -1.562950997044196E-12 6.900677238185396E-16
tp 2.183493329538791E-12 -7.55550420145925E-12 1.536020196559862E-8 7.209233038672741E-12 3.087014582912924E-9 5.445620713672464E-12
node -4.990431570995605E-16 1.004186097763512E-16 7.209233038672741E-12 3.068051479513652E-10 -3.000666595517387E-10 8.527413528732451E-12
peri 4.567339212633797E-13 -1.562950997044196E-12 3.087014582912924E-9 -3.000666595517387E-10 9.237910440357835E-10 -7.281644121337368E-12
i -1.335211887051631E-16 6.900677238185396E-16 5.445620713672464E-12 8.527413528732451E-12 -7.281644121337368E-12 1.570235673492574E-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 14.76   n/a E2021B10  
diameter diameter 4.509 km 0.196 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.166   0.035 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

58876 (1998 HT121)          Discovered 1998-Apr-23 by LINEAR at Socorro
Reference: 20030614/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1998 HT121 = 1992 DJ11 = 2000 WC102 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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