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139233 (2001 HT18)
Classification: Main-belt Asteroid          SPK-ID: 2139233
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1658218034687021 5.3884e-08  
a 2.635507350043739 1.7323e-08 au
q 2.198482768204467 1.412e-07 au
i 10.76631931526823 7.8267e-06 deg
node 192.9069189221628 2.7654e-05 deg
peri 79.40189577761633 3.5615e-05 deg
M 134.707826402455 2.3444e-05 deg
tp 2458415.729975724674
(2018-Oct-24.22997572)
9.9924e-05 TDB
period 1562.768952341145
4.28
1.5408e-05
4.218e-08
d
yr
n .2303603481888305 2.2711e-09 deg/d
Q 3.072531931883011 2.0195e-08 au
  Orbit Determination Parameters
   # obs. used (total)      347  
   data-arc span      9535 days (26.11 yr)  
   first obs. used      1993-09-18  
   last obs. used      2019-10-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60895  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 16:18:28  

Additional Information
 Earth MOID = 1.21377 au 
 Jupiter MOID = 2.099 au 
 T_jup = 3.353 
[ 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 16.2   n/a MPO436696  
diameter diameter 3.248 km 0.096 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.055   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

139233 (2001 HT18)          Discovered 2001-Apr-25 by Kusnirak, P., Pravec, P. at Ondrejov
Reference: 20061205/Numbers.arcLast Updated: 2006-12-13

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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