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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09159876504200638 3.8226e-08  
a 3.014501025758278 1.6911e-08 au
q 2.738376454580958 1.2084e-07 au
i 10.50464286356544 3.9653e-06 deg
node 145.6274958575048 1.7499e-05 deg
peri 173.5161985552177 3.0654e-05 deg
M 350.6542316671154 2.2348e-05 deg
tp 2459050.128836237748
(2020-Jul-19.62883624)
0.00011852 TDB
period 1911.708102449262
5.23
1.6086e-05
4.404e-08
d
yr
n .1883132678774398 1.5846e-09 deg/d
Q 3.290625596935598 1.846e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1069  
   data-arc span      10480 days (28.69 yr)  
   first obs. used      1992-02-29  
   last obs. used      2020-11-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54116  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 03:57:22  

Additional Information
 Earth MOID = 1.72579 au 
 Jupiter MOID = 2.02786 au 
 T_jup = 3.217 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457517.5 (2016-May-09.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09221793375690086 3.8585e-08  
q 2.734806465383211 1.223e-07 au
tp 2457148.010156783151
(2015-May-05.51015678)
0.00012394 TDB
node 145.7498830945216 1.753e-05 deg
peri 174.9402734463559 3.0403e-05 deg
i 10.49647229087908 3.9632e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1069  
   data-arc span      10480 days (28.69 yr)  
   first obs. used      1992-02-29  
   last obs. used      2020-11-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54116  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 03:57:22  

Additional Information
 Jupiter MOID = 2.02786 au 
 T_jup = 3.217 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.488831199225095E-15 -4.685716986093728E-15 2.182647722647626E-12 -5.863553083017647E-16 4.567161077241415E-13 -1.266622334002517E-16
q -4.685716986093728E-15 1.495844862415212E-14 -7.552453524852377E-12 3.832394028842335E-16 -1.562847368477428E-12 6.685378671843415E-16
tp 2.182647722647626E-12 -7.552453524852377E-12 1.536102130362194E-8 7.018273920632801E-12 3.087276695898649E-9 5.465996375398813E-12
node -5.863553083017647E-16 3.832394028842335E-16 7.018273920632801E-12 3.073076951324887E-10 -3.006006094458501E-10 8.479004447297843E-12
peri 4.567161077241415E-13 -1.562847368477428E-12 3.087276695898649E-9 -3.006006094458501E-10 9.243576803358349E-10 -7.229961571491279E-12
i -1.266622334002517E-16 6.685378671843415E-16 5.465996375398813E-12 8.479004447297843E-12 -7.229961571491279E-12 1.570702788989007E-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 14.6   n/a MPO436193  
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

[ show close-approach data ]
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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