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129557 (1996 XA1)
Classification: Main-belt Asteroid          SPK-ID: 2129557
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 .1590970525492016 5.0146e-08  
a 2.556432696078994 1.4111e-08 au
q 2.149711789092417 1.3294e-07 au
i 5.523731835305868 5.1774e-06 deg
node 40.15695272012336 3.5913e-05 deg
peri 2.388250837998868 3.8362e-05 deg
M 293.5149361689813 1.7005e-05 deg
tp 2459276.222089653540
(2021-Mar-02.72208965)
7.2214e-05 TDB
period 1492.966187526835
4.09
1.2361e-05
3.384e-08
d
yr
n .2411307121404779 1.9965e-09 deg/d
Q 2.96315360306557 1.6356e-08 au
  Orbit Determination Parameters
   # obs. used (total)      745  
   data-arc span      8639 days (23.65 yr)  
   first obs. used      1996-12-02  
   last obs. used      2020-07-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51256  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 10:40:54  

Additional Information
 Earth MOID = 1.15834 au 
 Jupiter MOID = 2.441 au 
 T_jup = 3.413 
[ 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 15.5   n/a MPO401141  
diameter diameter 5.380 km 0.291 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.042   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

129557 (1996 XA1)          Discovered 1996-Dec-02 by Kobayashi, T. at Oizumi
Reference: 20060711/Numbers.arcLast Updated: 2006-07-17

[ show close-approach data ]
Alternate Designations
 1996 XA1 = 2000 UH79 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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