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JPL Small-Body Database Browser
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136902 (1998 HL55)
Classification: Main-belt Asteroid          SPK-ID: 2136902
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1714729518497997 5.1403e-08  
a 3.075151728587604 2.3699e-08 au
q 2.547846384300673 1.5911e-07 au
i 12.28542769105317 5.74e-06 deg
node 28.98677735304189 2.3661e-05 deg
peri 128.4445859639662 2.8405e-05 deg
M 1.752819738056838 1.4828e-05 deg
tp 2458590.909682078462
(2019-Apr-17.40968208)
8.1104e-05 TDB
period 1969.691678381571
5.39
2.277e-05
6.234e-08
d
yr
n .1827697217545235 2.1128e-09 deg/d
Q 3.602457072874535 2.7763e-08 au
  Orbit Determination Parameters
   # obs. used (total)      482  
   data-arc span      7714 days (21.12 yr)  
   first obs. used      1998-03-25  
   last obs. used      2019-05-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61379  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 07:13:29  

Additional Information
 Earth MOID = 1.57692 au 
 Jupiter MOID = 1.45466 au 
 T_jup = 3.172 
[ 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 15.0   n/a MPO432830  
diameter diameter 5.539 km 0.734 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.069   0.065 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

136902 (1998 HL55)          Discovered 1998-Apr-21 by LINEAR at Socorro
Reference: 20061205/Numbers.arcLast Updated: 2006-12-13

[ show close-approach data ]
Alternate Designations
 1998 HL55 = 2001 YL94 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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