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100844 (1998 HH23)
Classification: Main-belt Asteroid          SPK-ID: 2100844
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04523545382853542 4.2227e-08  
a 3.118489644506989 2.1225e-08 au
q 2.977423350178127 1.3201e-07 au
i 3.427717705268163 4.621e-06 deg
node 150.5075855771246 6.8364e-05 deg
peri 52.15445343940381 8.2538e-05 deg
M 359.570127202571 4.4981e-05 deg
tp 2459002.901885769392
(2020-Jun-02.40188577)
0.00025133 TDB
period 2011.476143995772
5.51
2.0536e-05
5.622e-08
d
yr
n .178973039811879 1.8272e-09 deg/d
Q 3.259555938835851 2.2185e-08 au
  Orbit Determination Parameters
   # obs. used (total)      630  
   data-arc span      8930 days (24.45 yr)  
   first obs. used      1995-11-15  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60253  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 17:56:07  

Additional Information
 Earth MOID = 1.97554 au 
 Jupiter MOID = 1.69844 au 
 T_jup = 3.213 
[ 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 MPO436469  
diameter diameter 4.898 km 0.494 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.067   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

100844 (1998 HH23)          Discovered 1998-Apr-20 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1998 HH23 = 2001 XK78 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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