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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 
[ 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 14.76   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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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
2138-Mar-11 23:06 00:01 Hygie 0.0278883418836172 0.027855097856711 0.0279215866475751 4.31426955711317 4.31426923598939 2502018.462301981 1.30745414970069 1670.74242809845 55.7518700343365 7.79437473872203 10426.3847937767 T 24 CATAB v2.0f-lin.ifort 2021-Feb-24 05:44:51 2021-Feb-24 05:44

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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