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18867 (1999 RX223)
Classification: Main-belt Asteroid          SPK-ID: 2018867
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1286565650376988 4.1511e-08  
a 2.703878237811904 1.1815e-08 au
q 2.356006551454838 1.1141e-07 au
i 12.20405416577397 4.7897e-06 deg
node 225.7569868457886 1.9247e-05 deg
peri 309.5791825235056 2.5193e-05 deg
M 54.84652972766484 1.6339e-05 deg
tp 2458753.085142664689
(2019-Sep-26.58514266)
7.3417e-05 TDB
period 1623.974189123311
4.45
1.0644e-05
2.914e-08
d
yr
n .2216784000701039 1.453e-09 deg/d
Q 3.051749924168969 1.3335e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1710  
   data-arc span      10423 days (28.54 yr)  
   first obs. used      1991-12-03  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47106  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 18:26:48  

Additional Information
 Earth MOID = 1.37821 au 
 Jupiter MOID = 1.99416 au 
 T_jup = 3.322 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456622.5 (2013-Nov-26.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1300540642275248 4.1342e-08  
q 2.351387450466739 1.1123e-07 au
tp 2457128.636487083771
(2015-Apr-16.13648708)
7.1676e-05 TDB
node 225.8486465884235 1.924e-05 deg
peri 309.4981078625528 2.5098e-05 deg
i 12.20905129025833 4.7909e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1710  
   data-arc span      10423 days (28.54 yr)  
   first obs. used      1991-12-03  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47106  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 18:26:48  

Additional Information
 Jupiter MOID = 1.99416 au 
 T_jup = 3.322 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.709129319903811E-15 -4.578604547384171E-15 6.255750260700799E-13 3.843192840735776E-15 1.353798312661848E-13 -2.951365597709452E-15
q -4.578604547384171E-15 1.237143154955616E-14 -1.676720690115504E-12 -1.074144343922253E-14 -3.699024864153145E-13 8.460566198965805E-15
tp 6.255750260700799E-13 -1.676720690115504E-12 5.137379019464032E-9 3.309856725977315E-12 1.171065261047272E-9 -7.607823474483503E-13
node 3.843192840735776E-15 -1.074144343922253E-14 3.309856725977315E-12 3.70161563759684E-10 -3.604688498576917E-10 -1.419371060446694E-11
peri 1.353798312661848E-13 -3.699024864153145E-13 1.171065261047272E-9 -3.604688498576917E-10 6.299047698143525E-10 1.372411095720246E-11
i -2.951365597709452E-15 8.460566198965805E-15 -7.607823474483503E-13 -1.419371060446694E-11 1.372411095720246E-11 2.295300890817411E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.3   n/a MPO279712  
diameter diameter 5.516 km 0.050 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.231   0.036 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18867 (1999 RX223)          Discovered 1999-Sep-07 by CSS at Catalina
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 RX223 = 1998 MQ10 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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