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21761 (1999 RB201)
Classification: Main-belt Asteroid          SPK-ID: 2021761
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1814259794190512 5.055e-08  
a 2.564283342613508 1.2077e-08 au
q 2.099055725671894 1.2538e-07 au
i 12.06616220054107 5.9063e-06 deg
node 233.7529722169672 2.573e-05 deg
peri 111.9784946630311 3.1911e-05 deg
M 72.47227524830463 2.0879e-05 deg
tp 2458898.562650026835
(2020-Feb-19.06265003)
8.5796e-05 TDB
period 1499.84867479212
4.11
1.0596e-05
2.901e-08
d
yr
n .2400242144761013 1.6957e-09 deg/d
Q 3.029510959555122 1.4268e-08 au
  Orbit Determination Parameters
   # obs. used (total)      767  
   data-arc span      10668 days (29.21 yr)  
   first obs. used      1991-11-04  
   last obs. used      2021-01-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53423  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:54:20  

Additional Information
 Earth MOID = 1.12641 au 
 Jupiter MOID = 2.54395 au 
 T_jup = 3.379 
[ 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 14.98   n/a E2021B10  

21761 (1999 RB201)          Discovered 1999-Sep-08 by LINEAR at Socorro
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 RB201 = 1991 VZ 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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