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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1069053234079159 3.4664e-08  
a 2.294117984714877 8.0296e-09 au
q 2.048864559623017 8.1244e-08 au
i 5.31896112766787 3.8432e-06 deg
node 333.3270774642813 3.7892e-05 deg
peri 38.78193835376833 4.1756e-05 deg
M 39.61278071726959 1.734e-05 deg
tp 2459256.845517350262
(2021-Feb-11.34551735)
6.0966e-05 TDB
period 1269.176585020387
3.47
6.6634e-06
1.824e-08
d
yr
n .2836484727570177 1.4892e-09 deg/d
Q 2.539371409806737 8.888e-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 = 1.0504 au 
 Jupiter MOID = 2.91043 au 
 T_jup = 3.583 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457136.5 (2015-Apr-24.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1069923003540184 3.4519e-08  
q 2.049724351973938 8.0926e-08 au
tp 2456718.572033816570
(2014-Mar-02.07203382)
5.9709e-05 TDB
node 333.3910936149411 3.7905e-05 deg
peri 38.99729858143818 4.1788e-05 deg
i 5.318008752075004 3.8415e-06 deg
  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
 Jupiter MOID = 2.91043 au 
 T_jup = 3.583 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.191551947364909E-15 -2.782778230886772E-15 -1.571125113492294E-13 5.794386734133841E-15 -7.328565156152418E-14 -1.901951786843213E-15
q -2.782778230886772E-15 6.548962447440097E-15 3.568839874785382E-13 -1.413553538390704E-14 1.719092103518445E-13 4.542314787891898E-15
tp -1.571125113492294E-13 3.568839874785382E-13 3.565124918120097E-9 4.218385027628606E-12 1.058645160703638E-9 -1.185666040497145E-12
node 5.794386734133841E-15 -1.413553538390704E-14 4.218385027628606E-12 1.436759955280805E-9 -1.429260911843585E-9 1.009636175546827E-11
peri -7.328565156152418E-14 1.719092103518445E-13 1.058645160703638E-9 -1.429260911843585E-9 1.746235895130749E-9 -1.036359720330116E-11
i -1.901951786843213E-15 4.542314787891898E-15 -1.185666040497145E-12 1.009636175546827E-11 -1.036359720330116E-11 1.47567963463424E-11

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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