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20490 (1999 OW2)
Classification: Main-belt Asteroid          SPK-ID: 2020490
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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1521047462293526 4.1051e-08  
a 2.614313006228052 1.1014e-08 au
q 2.216663589851638 1.114e-07 au
i 21.20624678385645 4.2433e-06 deg
node 313.0931587402403 1.1991e-05 deg
peri 101.2239262761459 2.2378e-05 deg
M 342.3684478179717 1.583e-05 deg
tp 2459276.117592839594
(2021-Mar-02.61759284)
6.7822e-05 TDB
period 1543.955582651493
4.23
9.7573e-06
2.671e-08
d
yr
n .2331673294524175 1.4735e-09 deg/d
Q 3.011962422604465 1.269e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2237  
   data-arc span      15940 days (43.64 yr)  
   first obs. used      1977-07-12  
   last obs. used      2021-03-03  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .35643  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:22:15  

Additional Information
 Earth MOID = 1.3329 au 
 Jupiter MOID = 2.4051 au 
 T_jup = 3.297 
[ 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 12.97   n/a E2021B10  
diameter diameter 7.779 km 0.160 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.288   0.035 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20490 (1999 OW2)          Discovered 1999-Jul-22 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 OW2 = 1986 SY1 = 1986 TR13 = 1992 BO1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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