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21309 (1996 XH5)
Classification: Main-belt Asteroid          SPK-ID: 2021309
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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0778736891841825 3.5176e-08  
a 2.388608205076809 8.3209e-09 au
q 2.20259847213187 8.3599e-08 au
i 6.860141767394093 4.8868e-06 deg
node 351.9243407507042 2.7004e-05 deg
peri 66.89233984297329 4.1245e-05 deg
M 195.9325127735527 3.0373e-05 deg
tp 2459815.019732070619
(2022-Aug-23.51973207)
0.0001144 TDB
period 1348.390880394745
3.69
7.0458e-06
1.929e-08
d
yr
n .2669848967642149 1.3951e-09 deg/d
Q 2.574617938021748 8.9689e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1203  
   data-arc span      8569 days (23.46 yr)  
   first obs. used      1996-12-06  
   last obs. used      2020-05-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54121  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:43:09  

Additional Information
 Earth MOID = 1.22358 au 
 Jupiter MOID = 2.64385 au 
 T_jup = 3.520 
[ 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 15.14   n/a E2021B10  
diameter diameter 2.785 km 0.464 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.274   0.059 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21309 (1996 XH5)          Discovered 1996-Dec-06 by Japan Spaceguard Association at Kiso
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1996 XH5 = 1999 RK54 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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