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175738 (1998 HR66)
Classification: Main-belt Asteroid          SPK-ID: 2175738
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1452346985582319 5.3164e-08  
a 3.055780912955015 2.6668e-08 au
q 2.611975493201995 1.7128e-07 au
i 11.49563106068204 5.9118e-06 deg
node 187.1475250076471 2.6826e-05 deg
peri 120.0301283346294 3.4711e-05 deg
M 2.253956127670861 1.9937e-05 deg
tp 2459188.284121477579
(2020-Dec-04.78412148)
0.00010802 TDB
period 1951.109967972677
5.34
2.5541e-05
6.993e-08
d
yr
n .1845103586724341 2.4153e-09 deg/d
Q 3.499586332708035 3.0541e-08 au
  Orbit Determination Parameters
   # obs. used (total)      610  
   data-arc span      9447 days (25.86 yr)  
   first obs. used      1994-10-08  
   last obs. used      2020-08-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .58763  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:06:36  

Additional Information
 Earth MOID = 1.61932 au 
 Jupiter MOID = 1.92852 au 
 T_jup = 3.189 
[ 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 14.94   n/a E2021B55  
diameter diameter 3.004 km 0.729 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.258   0.126 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

175738 (1998 HR66)          Discovered 1998-Apr-21 by LINEAR at Socorro
Reference: 20080221/Numbers.arcLast Updated: 2008-02-22

[ show close-approach data ]
Alternate Designations
 1998 HR66 = 2003 ES51 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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