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118328 (1998 YH21)
Classification: Main-belt Asteroid          SPK-ID: 2118328
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03582193479511255 4.0011e-08  
a 2.424170955088603 1.1259e-08 au
q 2.337332461203214 1.0072e-07 au
i 5.949257898584597 3.8424e-06 deg
node 289.0729897894427 4.7457e-05 deg
peri 204.0122711995276 8.5846e-05 deg
M 277.2102174513975 7.1516e-05 deg
tp 2459517.542535992193
(2021-Oct-30.04253599)
0.00027436 TDB
period 1378.615928725086
3.77
9.6045e-06
2.63e-08
d
yr
n .2611314670743142 1.8192e-09 deg/d
Q 2.511009448973993 1.1662e-08 au
  Orbit Determination Parameters
   # obs. used (total)      655  
   data-arc span      8084 days (22.13 yr)  
   first obs. used      1998-12-14  
   last obs. used      2021-01-31  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .58257  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 16:56:44  

Additional Information
 Earth MOID = 1.35322 au 
 Jupiter MOID = 2.51005 au 
 T_jup = 3.503 
[ 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 16.0   n/a MPO338091  

118328 (1998 YH21)          Discovered 1998-Dec-26 by Spacewatch at Kitt Peak
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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