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85616 (1998 HA42)
Classification: Main-belt Asteroid          SPK-ID: 2085616
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .115966143344786 3.6609e-08  
a 3.091355400711384 1.9252e-08 au
q 2.732862837182809 1.2257e-07 au
i 10.29630278811669 5.2191e-06 deg
node 182.0682036533887 2.1547e-05 deg
peri 106.9939997509434 3.2825e-05 deg
M 311.7557294591714 2.3649e-05 deg
tp 2459266.551110395809
(2021-Feb-21.05111040)
0.00013055 TDB
period 1985.280296889035
5.44
1.8546e-05
5.078e-08
d
yr
n .1813345957062716 1.694e-09 deg/d
Q 3.449847964239959 2.1485e-08 au
  Orbit Determination Parameters
   # obs. used (total)      777  
   data-arc span      10330 days (28.28 yr)  
   first obs. used      1992-03-06  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55234  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-24 00:17:24  

Additional Information
 Earth MOID = 1.7399 au 
 Jupiter MOID = 1.81349 au 
 T_jup = 3.190 
[ 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 14.6   n/a MPO250930  
diameter diameter 4.739 km 0.247 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.125   0.036 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

85616 (1998 HA42)          Discovered 1998-Apr-24 by Spacewatch at Kitt Peak
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

[ show close-approach data ]
Alternate Designations
 1998 HA42 = 2003 EW9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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