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100872 (1998 HS81)
Classification: Main-belt Asteroid          SPK-ID: 2100872
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1343512989670562 5.0582e-08  
a 3.031033143958494 2.2705e-08 au
q 2.62380990385547 1.4596e-07 au
i 6.621313451433411 4.7217e-06 deg
node 44.90508529318238 4.2987e-05 deg
peri 142.8655747314323 4.6754e-05 deg
M 124.9073436591865 1.7003e-05 deg
tp 2458531.740558116525
(2019-Feb-17.24055812)
9.1444e-05 TDB
period 1927.455920725958
5.28
2.1658e-05
5.93e-08
d
yr
n .1867746992960593 2.0987e-09 deg/d
Q 3.438256384061518 2.5756e-08 au
  Orbit Determination Parameters
   # obs. used (total)      597  
   data-arc span      9065 days (24.82 yr)  
   first obs. used      1995-11-16  
   last obs. used      2020-09-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55003  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:03:48  

Additional Information
 Earth MOID = 1.62737 au 
 Jupiter MOID = 1.52574 au 
 T_jup = 3.219 
[ 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 14.96   n/a E2021B55  
diameter diameter 7.508 km 0.586 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.038   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

100872 (1998 HS81)          Discovered 1998-Apr-21 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1998 HS81 = 2001 XA236 = 2003 EB28 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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