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21533 (1998 OR12)
Classification: Main-belt Asteroid          SPK-ID: 2021533
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 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06376062107661654 3.6171e-08  
a 2.929183783609778 1.4562e-08 au
q 2.742417206319265 1.0606e-07 au
i 3.00526104836726 3.3182e-06 deg
node 130.9309171588011 7.2074e-05 deg
peri 280.7002124735093 7.7437e-05 deg
M 86.63866830523094 2.6732e-05 deg
tp 2458759.815651627897
(2019-Oct-03.31565163)
0.0001365 TDB
period 1831.12654565558
5.01
1.3654e-05
3.738e-08
d
yr
n .1966002845920803 1.466e-09 deg/d
Q 3.115950360900291 1.549e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2157  
   data-arc span      11352 days (31.08 yr)  
   first obs. used      1989-12-20  
   last obs. used      2021-01-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47451  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:53:05  

Additional Information
 Earth MOID = 1.75423 au 
 Jupiter MOID = 2.12211 au 
 T_jup = 3.272 
[ 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 13.49   n/a E2021B10  
diameter diameter 6.381 km 0.101 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.208   0.041 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21533 (1998 OR12)          Discovered 1998-Jul-26 by Elst, E. W. at La Silla
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 OR12 = 1989 YC9 = 2000 AT68 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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