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134999 (2001 HC9)
Classification: Main-belt Asteroid          SPK-ID: 2134999
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07253872428365594 4.886e-08  
a 3.171302611867616 2.6662e-08 au
q 2.941260366085313 1.511e-07 au
i 15.89565064273014 8.9539e-06 deg
node 49.28967065641508 1.6813e-05 deg
peri 224.7933334110719 6.3837e-05 deg
M 126.3349615467033 6.2519e-05 deg
tp 2458476.604284072137
(2018-Dec-24.10428407)
0.00035662 TDB
period 2062.789702418928
5.65
2.6013e-05
7.122e-08
d
yr
n .1745209410236276 2.2008e-09 deg/d
Q 3.401344857649919 2.8596e-08 au
  Orbit Determination Parameters
   # obs. used (total)      612  
   data-arc span      10295 days (28.19 yr)  
   first obs. used      1992-11-25  
   last obs. used      2021-02-01  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57984  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 18:11:03  

Additional Information
 Earth MOID = 1.94558 au 
 Jupiter MOID = 1.67401 au 
 T_jup = 3.138 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457714.5 (2016-Nov-22.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07502276827623382 4.7031e-08  
q 2.932617346895316 1.4539e-07 au
tp 2458484.479353582806
(2018-Dec-31.97935358)
0.00035152 TDB
node 49.32623020754543 1.6817e-05 deg
peri 226.4076415119232 6.3132e-05 deg
i 15.8985489705631 8.9607e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      612  
   data-arc span      10295 days (28.19 yr)  
   first obs. used      1992-11-25  
   last obs. used      2021-02-01  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57984  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 18:11:03  

Additional Information
 Jupiter MOID = 1.67401 au 
 T_jup = 3.138 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.211886387843254E-15 -6.745459943782964E-15 -7.859927440088889E-12 1.111079319998338E-15 -1.452473801415919E-12 4.857398204923888E-16
q -6.745459943782964E-15 2.113741107717939E-14 2.62036856151376E-11 -6.945656663446846E-15 4.773150476029993E-12 1.676453952846506E-15
tp -7.859927440088889E-12 2.62036856151376E-11 1.235695897385321E-7 -5.071002310744235E-11 2.139642899902516E-8 3.041663913669555E-11
node 1.111079319998338E-15 -6.945656663446846E-15 -5.071002310744235E-11 2.828031223265932E-10 -2.800807537192793E-10 -7.850786382689227E-11
peri -1.452473801415919E-12 4.773150476029993E-12 2.139642899902516E-8 -2.800807537192793E-10 3.985694217805584E-9 8.027738585337014E-11
i 4.857398204923888E-16 1.676453952846506E-15 3.041663913669555E-11 -7.850786382689227E-11 8.027738585337014E-11 8.0294685363674E-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 14.39   n/a MPCxxxxx  
diameter diameter 8.971 km 0.176 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.046   0.016 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

134999 (2001 HC9)          Discovered 2001-Apr-16 by LINEAR at Socorro
Reference: 20060907/Numbers.arcLast Updated: 2006-09-10

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