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21767 (1999 RB209)
Classification: Main-belt Asteroid          SPK-ID: 2021767
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1609567949497741 4.477e-08  
a 3.156908899751638 1.7905e-08 au
q 2.648782961299197 1.4707e-07 au
i 7.609063301332093 5.2106e-06 deg
node 319.6236083862435 3.115e-05 deg
peri 59.67536665087278 3.4099e-05 deg
M 317.969377254691 1.4291e-05 deg
tp 2459635.696502434653
(2022-Feb-25.19650243)
8.212e-05 TDB
period 2048.761956211695
5.61
1.743e-05
4.772e-08
d
yr
n .1757158750964242 1.4949e-09 deg/d
Q 3.665034838204079 2.0786e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1241  
   data-arc span      14157 days (38.76 yr)  
   first obs. used      1982-11-04  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52641  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:45:17  

Additional Information
 Earth MOID = 1.65993 au 
 Jupiter MOID = 1.89189 au 
 T_jup = 3.172 
[ 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 13.69   n/a MPO636390  
diameter diameter 5.314 km 0.245 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.189   0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21767 (1999 RB209)          Discovered 1999-Sep-08 by LINEAR at Socorro
Reference: 20010208/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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