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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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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1952813743307777 2.7452e-08  
a 2.549307465621909 1.0956e-08 au
q 2.051475200143551 7.3731e-08 au
i 12.49733130656526 3.0787e-06 deg
node 180.0798844384447 1.7025e-05 deg
peri 320.930860071445 2.0788e-05 deg
M 299.7661509812615 1.361e-05 deg
tp 2459449.253883060503
(2021-Aug-22.75388306)
5.6632e-05 TDB
period 1486.728797190465
4.07
9.584e-06
2.624e-08
d
yr
n .242142346795399 1.5609e-09 deg/d
Q 3.047139731100267 1.3095e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1577  
   data-arc span      14109 days (38.63 yr)  
   first obs. used      1982-07-24  
   last obs. used      2021-03-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44328  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:22:45  

Additional Information
 Earth MOID = 1.07787 au 
 Jupiter MOID = 2.01452 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 14.49   n/a E2021B10  
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

[ show close-approach data ]
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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