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72255 (2001 AZ31)
Classification: Main-belt Asteroid          SPK-ID: 2072255
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1069917255166559 3.4658e-08  
a 2.294294666797626 8.119e-09 au
q 2.048824121553287 8.1252e-08 au
i 5.318896094098029 3.8431e-06 deg
node 333.3267507963739 3.7892e-05 deg
peri 38.73732243818302 4.175e-05 deg
M 344.0554818899644 1.7259e-05 deg
tp 2459256.718741272280
(2021-Feb-11.21874127)
6.092e-05 TDB
period 1269.323206781787
3.48
6.7378e-06
1.845e-08
d
yr
n .2836157080218645 1.5055e-09 deg/d
Q 2.539765212041965 8.9876e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1007  
   data-arc span      8316 days (22.77 yr)  
   first obs. used      1998-03-03  
   last obs. used      2020-12-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49817  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 13:01:04  

Additional Information
 Earth MOID = 1.04963 au 
 Jupiter MOID = 2.91106 au 
 T_jup = 3.583 
[ 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 15.83   n/a E2021B10  
diameter diameter 3.599 km 0.059 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 6.387 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.073   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

72255 (2001 AZ31)          Discovered 2001-Jan-04 by LINEAR at Socorro
Reference: 20031109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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