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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 ]

[ show orbit diagram ]
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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456638.5 (2013-Dec-12.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1435122671048682 5.3413e-08  
q 2.614612515725382 1.7131e-07 au
tp 2457243.826520326009
(2015-Aug-09.32652033)
0.00010691 TDB
node 187.247458898865 2.6829e-05 deg
peri 120.8462903362962 3.4861e-05 deg
i 11.49638698563112 5.9118e-06 deg
  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
 Jupiter MOID = 1.92852 au 
 T_jup = 3.189 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.852916616663706E-15 -9.078913419204927E-15 1.038851634420266E-12 -2.0087296106653E-14 2.810327640012527E-13 -1.248272374757928E-14
q -9.078913419204927E-15 2.934671335284989E-14 -3.232870608895585E-12 6.245404977353388E-14 -9.085723007934132E-13 4.194376656611543E-14
tp 1.038851634420266E-12 -3.232870608895585E-12 1.143036805501358E-8 -1.019769644598176E-11 2.403607568823049E-9 -1.648354670853656E-12
node -2.0087296106653E-14 6.245404977353388E-14 -1.019769644598176E-11 7.198096489935368E-10 -7.073033712423281E-10 -1.348223571303053E-11
peri 2.810327640012527E-13 -9.085723007934132E-13 2.403607568823049E-9 -7.073033712423281E-10 1.215298019951635E-9 1.262927624613868E-11
i -1.248272374757928E-14 4.194376656611543E-14 -1.648354670853656E-12 -1.348223571303053E-11 1.262927624613868E-11 3.494879472768043E-11

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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