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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1171744962862034 3.1862e-08  
a 3.095441685079622 1.7219e-08 au
q 2.7327348648471 1.0529e-07 au
i 10.300035685253 4.7368e-06 deg
node 182.0041756072366 2.0001e-05 deg
peri 106.797704784889 3.1233e-05 deg
M 23.72370012380786 2.1875e-05 deg
tp 2459265.412194840281
(2021-Feb-19.91219484)
0.00012101 TDB
period 1989.217938652831
5.45
1.6598e-05
4.544e-08
d
yr
n .1809756452547401 1.5101e-09 deg/d
Q 3.458148505312143 1.9237e-08 au
  Orbit Determination Parameters
   # obs. used (total)      849  
   data-arc span      10747 days (29.42 yr)  
   first obs. used      1992-03-06  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54215  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 01:54:09  

Additional Information
 Earth MOID = 1.73947 au 
 Jupiter MOID = 1.80447 au 
 T_jup = 3.188 
[ 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 14.66   n/a MPO637174  
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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