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72251 (2001 AJ31)
Classification: Main-belt Asteroid          SPK-ID: 2072251
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1510388391121691 4.072e-08  
a 2.551764583460034 1.0018e-08 au
q 2.166349023086683 1.0597e-07 au
i 11.56389724706617 3.9623e-06 deg
node 73.12592742270311 1.7914e-05 deg
peri 145.0042403808261 2.0848e-05 deg
M 220.1797843774139 1.2649e-05 deg
tp 2459778.764859918396
(2022-Jul-18.26485992)
5.4568e-05 TDB
period 1488.878762228104
4.08
8.7674e-06
2.4e-08
d
yr
n .2417926893263362 1.4238e-09 deg/d
Q 2.937180143833386 1.1531e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1523  
   data-arc span      7797 days (21.35 yr)  
   first obs. used      1999-10-08  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48442  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 13:01:02  

Additional Information
 Earth MOID = 1.16646 au 
 Jupiter MOID = 2.07096 au 
 T_jup = 3.396 
[ 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 14.43   n/a MPCxxxxx  
diameter diameter 3.442 km 0.083 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.259   0.037 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

72251 (2001 AJ31)          Discovered 2001-Jan-04 by LINEAR at Socorro
Reference: 20031109/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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