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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03574214925994496 4.9387e-08  
a 2.424020339382727 1.4377e-08 au
q 2.337380642603367 1.1815e-07 au
i 5.949257700248032 5.4965e-06 deg
node 289.0720603457062 4.8552e-05 deg
peri 204.1678812421351 8.8052e-05 deg
M 224.8139774352292 7.255e-05 deg
tp 2459518.145098268845
(2021-Oct-30.64509827)
0.00027824 TDB
period 1378.487448933549
3.77
1.2264e-05
3.358e-08
d
yr
n .2611558054289939 2.3234e-09 deg/d
Q 2.510660036162087 1.4891e-08 au
  Orbit Determination Parameters
   # obs. used (total)      486  
   data-arc span      7067 days (19.35 yr)  
   first obs. used      1998-12-14  
   last obs. used      2018-04-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62141  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 10:28:22  

Additional Information
 Earth MOID = 1.35335 au 
 Jupiter MOID = 2.5111 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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