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20617 (1999 SA7)
Classification: Outer Main-belt Asteroid          SPK-ID: 2020617
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 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06060485753756385 1.408e-08  
a 3.227768225656908 2.1223e-08 au
q 3.032149792176696 5.3e-08 au
i 21.45433609229416 5.3874e-07 deg
node 350.2834761777341 3.6161e-06 deg
peri 84.55990320100931 1.8195e-05 deg
M 143.5477755113403 1.9507e-05 deg
tp 2458355.910056434889
(2018-Aug-25.41005644)
0.00011487 TDB
period 2118.126725408015
5.80
2.0891e-05
5.72e-08
d
yr
n .1699615021526406 1.6763e-09 deg/d
Q 3.423386659137121 2.2509e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1927  
   data-arc span      14029 days (38.41 yr)  
   first obs. used      1982-09-18  
   last obs. used      2021-02-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39759  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:25:05  

Additional Information
 Earth MOID = 2.12728 au 
 Jupiter MOID = 1.76373 au 
 T_jup = 3.075 
[ 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 12.49   n/a E2021B10  
diameter diameter 17.496 km 0.264 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.069   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20617 (1999 SA7)          Discovered 1999-Sep-29 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 SA7 = 1982 SO7 = 1997 BR9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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