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72516 (2001 DC81)
Classification: Main-belt Asteroid          SPK-ID: 2072516
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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08516823213507499 3.3608e-08  
a 2.747850601419719 1.5283e-08 au
q 2.513821023525499 9.8117e-08 au
i 7.545583066086719 3.5335e-06 deg
node 109.1928929674995 2.7891e-05 deg
peri 229.636956906025 3.6542e-05 deg
M 325.5477527741263 2.4169e-05 deg
tp 2459359.722029854970
(2021-May-25.22202986)
0.00011172 TDB
period 1663.750128460179
4.56
1.388e-05
3.8e-08
d
yr
n .2163786459527936 1.8052e-09 deg/d
Q 2.981880179313939 1.6585e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1411  
   data-arc span      17837 days (48.84 yr)  
   first obs. used      1971-10-22  
   last obs. used      2020-08-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48916  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 13:02:30  

Additional Information
 Earth MOID = 1.50969 au 
 Jupiter MOID = 2.32561 au 
 T_jup = 3.329 
[ 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 14.30   n/a E2021B10  
diameter diameter 6.603 km 0.254 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.102   0.021 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

72516 (2001 DC81)          Discovered 2001-Feb-26 by Kobayashi, T. at Oizumi
Reference: 20031109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 2001 DC81 = 1971 UB4 = 1999 XR87 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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