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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1714433197544726 5.1518e-08  
a 3.076405687387441 2.3248e-08 au
q 2.548976483430198 1.59e-07 au
i 12.28241744893708 5.7388e-06 deg
node 28.9783301677903 2.3667e-05 deg
peri 128.6315439040046 2.8398e-05 deg
M 74.69777346838615 1.5005e-05 deg
tp 2458591.551149899540
(2019-Apr-18.05114990)
8.1057e-05 TDB
period 1970.896576970572
5.40
2.2341e-05
6.117e-08
d
yr
n .1826579863228283 2.0705e-09 deg/d
Q 3.603834891344684 2.7234e-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 = 1.5774 au 
 Jupiter MOID = 1.45112 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 15.1   n/a MPO469440  
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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