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100877 (1998 HN86)
Classification: Main-belt Asteroid          SPK-ID: 2100877
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1240026757903797 4.572e-08  
a 3.066186358986474 2.543e-08 au
q 2.685971046000189 1.4357e-07 au
i 7.696297133584162 5.026e-06 deg
node 222.3379898677257 4.1648e-05 deg
peri 349.7872366259862 4.7279e-05 deg
M 81.35641806161313 2.1982e-05 deg
tp 2458757.314476132261
(2019-Sep-30.81447613)
0.00011973 TDB
period 1961.084231505346
5.37
2.4397e-05
6.68e-08
d
yr
n .1835719211936454 2.2837e-09 deg/d
Q 3.446401671972758 2.8583e-08 au
  Orbit Determination Parameters
   # obs. used (total)      640  
   data-arc span      8133 days (22.27 yr)  
   first obs. used      1998-04-21  
   last obs. used      2020-07-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .6134  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:34:10  

Additional Information
 Earth MOID = 1.67925 au 
 Jupiter MOID = 1.53137 au 
 T_jup = 3.207 
[ 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 14.68   n/a E2021B55  
rotation period rot_per 30.9637 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]

100877 (1998 HN86)          Discovered 1998-Apr-21 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

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Alternate Designations
 1998 HN86 = 2001 XS209 = 2003 EH34 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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