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91109 (1998 HG38)
Classification: Main-belt Asteroid          SPK-ID: 2091109
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02816715046555827 4.2478e-08  
a 2.560490467522841 1.379e-08 au
q 2.488368747258497 1.1431e-07 au
i 15.50796021246315 6.8535e-06 deg
node 18.88780001431546 1.5647e-05 deg
peri 90.81549788607671 0.0001811 deg
M 234.9964119122941 0.00017535 deg
tp 2459520.140689344529
(2021-Nov-01.64068934)
0.00072782 TDB
period 1496.522228088179
4.10
1.209e-05
3.31e-08
d
yr
n .240557736626407 1.9434e-09 deg/d
Q 2.632612187787184 1.4179e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1580  
   data-arc span      13505 days (36.97 yr)  
   first obs. used      1983-10-01  
   last obs. used      2020-09-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47577  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-22 19:16:13  

Additional Information
 Earth MOID = 1.54308 au 
 Jupiter MOID = 2.38407 au 
 T_jup = 3.384 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.7   n/a MPO320098  
diameter diameter 4.897 km 0.130 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.293   0.084 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91109 (1998 HG38)          Discovered 1998-Apr-20 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

Alternate Designations
 1998 HG38 = 2000 XU18 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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