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JPL Small-Body Database Browser
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136915 (1998 HM109)
Classification: Main-belt Asteroid          SPK-ID: 2136915
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 .1490792740290917 5.375e-08  
a 3.07326298368102 2.4779e-08 au
q 2.615103169173373 1.6585e-07 au
i 22.99954458569657 7.3111e-06 deg
node 56.05113798041933 1.4705e-05 deg
peri 95.90518103816403 2.9321e-05 deg
M 81.84406812229494 2.3457e-05 deg
tp 2458553.113657738842
(2019-Mar-10.61365774)
0.0001275 TDB
period 1967.877292870576
5.39
2.3799e-05
6.516e-08
d
yr
n .1829382356838225 2.2125e-09 deg/d
Q 3.531422798188667 2.8473e-08 au
  Orbit Determination Parameters
   # obs. used (total)      695  
   data-arc span      7688 days (21.05 yr)  
   first obs. used      1998-04-23  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57631  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 07:13:30  

Additional Information
 Earth MOID = 1.74 au 
 Jupiter MOID = 1.80983 au 
 T_jup = 3.092 
[ 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 14.4   n/a MPO475190  
diameter diameter 8.742 km 0.314 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.053   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

136915 (1998 HM109)          Discovered 1998-Apr-23 by LINEAR at Socorro
Reference: 20061205/Numbers.arcLast Updated: 2006-12-13

[ show close-approach data ]
Alternate Designations
 1998 HM109 = 2001 UC76 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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