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85612 (1998 HL23)
Classification: Main-belt Asteroid          SPK-ID: 2085612
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1333035562579964 6.6776e-08  
a 2.609502263682808 1.7802e-08 au
q 2.261646331870597 1.7738e-07 au
i 11.55998844504625 8.6745e-06 deg
node 187.4929860839747 2.2239e-05 deg
peri 52.80782875659903 3.5176e-05 deg
M 322.6673881303669 2.523e-05 deg
tp 2458760.169078247935
(2019-Oct-03.66907825)		 0.00010825 TDB
period 1539.695866176789
4.22		 1.5756e-05
4.314e-08		 d
yr
n .2338124092610018 2.3926e-09 deg/d
Q 2.957358195495017 2.0175e-08 au
   Orbit Determination Parameters
   # obs. used (total)      424  
   data-arc span      7710 days (21.11 yr)  
   first obs. used      1998-03-22  
   last obs. used      2019-05-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62535  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 10:59:20  

Additional Information
 Earth MOID = 1.27161 au 
 Jupiter MOID = 2.07491 au 
 T_jup = 3.369 
[ show covariance matrix ]

[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.9   n/a MPO432399  
diameter diameter 4.012 km 0.177 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.063   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

85612 (1998 HL23)          Discovered 1998-Apr-20 by LINEAR at Socorro
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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