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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1338556663260649 4.603e-08  
a 2.609184453169372 1.5075e-08 au
q 2.259930329622776 1.1676e-07 au
i 11.56272956278064 6.1082e-06 deg
node 187.4284771854442 1.7031e-05 deg
peri 52.4768284892486 3.189e-05 deg
M 103.2570816823414 2.3669e-05 deg
tp 2458758.957059193010
(2019-Oct-02.45705919)
0.00010088 TDB
period 1539.414596080924
4.21
1.3342e-05
3.653e-08
d
yr
n .233855129681436 2.0267e-09 deg/d
Q 2.958438576715968 1.7093e-08 au
  Orbit Determination Parameters
   # obs. used (total)      515  
   data-arc span      8243 days (22.57 yr)  
   first obs. used      1998-03-22  
   last obs. used      2020-10-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .6  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 14:13:54  

Additional Information
 Earth MOID = 1.26855 au 
 Jupiter MOID = 2.07113 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 15.94   n/a E2021B10  
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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