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21303 (1996 XJ1)
Classification: Main-belt Asteroid          SPK-ID: 2021303
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1895239670743364 3.2653e-08  
a 2.449342130115848 8.2997e-09 au
q 1.985133092893987 8.1804e-08 au
i 3.619806772126002 3.554e-06 deg
node 78.95264370216179 6.0298e-05 deg
peri 249.6581171916611 6.1134e-05 deg
M 254.0880405700259 1.2017e-05 deg
tp 2459808.422114268190
(2022-Aug-16.92211427)
4.7732e-05 TDB
period 1400.143684761065
3.83
7.1167e-06
1.948e-08
d
yr
n .2571164687725848 1.3069e-09 deg/d
Q 2.913551167337708 9.8727e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1797  
   data-arc span      8955 days (24.52 yr)  
   first obs. used      1996-12-02  
   last obs. used      2021-06-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47603  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:32:30  

Additional Information
 Earth MOID = .976635 au 
 Jupiter MOID = 2.43498 au 
 T_jup = 3.469 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.5   n/a MPO452471  
diameter diameter 3.800 km 0.186 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.213   0.031 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21303 (1996 XJ1)          Discovered 1996-Dec-02 by Kobayashi, T. at Oizumi
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1996 XJ1 = 1998 FT55 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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