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21567 (1998 RB2)
Classification: Main-belt Asteroid          SPK-ID: 2021567
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2115925271942992 2.596e-08  
a 2.538711739274225 8.3881e-09 au
q 2.001539306543357 6.7185e-08 au
i 6.992453704300848 4.308e-06 deg
node 130.9036044769491 2.3324e-05 deg
peri 88.00844912054495 2.6556e-05 deg
M 333.141683344245 1.4281e-05 deg
tp 2459506.728729756353
(2021-Oct-19.22872976)
5.8855e-05 TDB
period 1477.469463961519
4.05
7.3225e-06
2.005e-08
d
yr
n .2436598581433534 1.2076e-09 deg/d
Q 3.075884172005093 1.0163e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1820  
   data-arc span      14673 days (40.17 yr)  
   first obs. used      1981-04-07  
   last obs. used      2021-06-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50922  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 05:09:12  

Additional Information
 Earth MOID = 1.00943 au 
 Jupiter MOID = 1.93419 au 
 T_jup = 3.405 
[ 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 14.63   n/a MPO636387  
diameter diameter 2.635 km 0.320 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.485   0.180 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21567 (1998 RB2)          Discovered 1998-Sep-01 by Zoltowski, F. B. at Woomera
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1998 RB2 = 1981 GL1 = 1999 XR152 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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