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JPL Small-Body Database Browser
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100871 (1998 HH81)
Classification: Main-belt Asteroid          SPK-ID: 2100871
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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1153957810175561 4.4752e-08  
a 2.297885719082817 9.2869e-09 au
q 2.032719401840167 1.0242e-07 au
i 2.01226580724324 4.5739e-06 deg
node 199.180564476615 0.00012047 deg
peri 24.09222733048303 0.00012193 deg
M 115.3810821693388 1.74e-05 deg
tp 2458592.722580567011
(2019-Apr-19.22258057)
6.1427e-05 TDB
period 1272.304508120539
3.48
7.713e-06
2.112e-08
d
yr
n .2829511313543922 1.7153e-09 deg/d
Q 2.563052036325467 1.0359e-08 au
  Orbit Determination Parameters
   # obs. used (total)      400  
   data-arc span      7743 days (21.20 yr)  
   first obs. used      1998-04-21  
   last obs. used      2019-07-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59365  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 01:12:31  

Additional Information
 Earth MOID = 1.02408 au 
 Jupiter MOID = 2.41087 au 
 T_jup = 3.584 
[ 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 17.1   n/a MPO432536  

100871 (1998 HH81)          Discovered 1998-Apr-21 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1998 HH81 = 2002 PH18 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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