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JPL Small-Body Database Browser
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20506 (1999 RO17)
Classification: Main-belt Asteroid          SPK-ID: 2020506
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1952439299873769 3.3942e-08  
a 2.548842691013844 1.3939e-08 au
q 2.0511966271007 8.5818e-08 au
i 12.49810078434095 3.5289e-06 deg
node 180.0820860500575 1.9306e-05 deg
peri 320.9799415012351 2.2657e-05 deg
M 251.2720723819994 1.6051e-05 deg
tp 2459449.402046527837
(2021-Aug-22.90204653)
6.8123e-05 TDB
period 1486.32223836543
4.07
1.2192e-05
3.338e-08
d
yr
n .2422085808228953 1.9869e-09 deg/d
Q 3.046488754926989 1.666e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1114  
   data-arc span      13649 days (37.37 yr)  
   first obs. used      1982-07-24  
   last obs. used      2019-12-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49292  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 00:44:29  

Additional Information
 Earth MOID = 1.07769 au 
 Jupiter MOID = 2.01572 au 
 T_jup = 3.382 
[ 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 14.4   n/a MPO435890  
diameter diameter 6.660 km 0.072 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.079   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20506 (1999 RO17)          Discovered 1999-Sep-07 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1999 RO17 = 1989 EH = 1998 MS44 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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