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1686 De Sitter (1935 SR1)
Classification: Main-belt Asteroid          SPK-ID: 2001686
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1633484578537916 4.8495e-08  
a 3.159871286576825 1.9627e-08 AU
q 2.643711184898025 1.5654e-07 AU
i .6221192377080893 5.3111e-06 deg
node 6.511851873060651 0.0004713 deg
peri 294.9039485139909 0.00047134 deg
M 82.30075612327033 1.5434e-05 deg
tp 2456531.466524306497
(2013-Aug-26.96652431)
8.6316e-05 JED
period 2051.646414970406
5.62
1.9115e-05
5.233e-08
d
yr
n .1754688319454855 1.6349e-09 deg/d
Q 3.676031388255626 2.2833e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1695  
   data-arc span      29756 days (81.47 yr)  
   first obs. used      1933-04-14  
   last obs. used      2014-10-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52908  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Oct-09 13:51:39  

Additional Information
 Earth MOID = 1.62941 AU 
 T_jup = 3.184 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.0 mag n/a MPO265965  

1686 De Sitter (1935 SR1)          Discovered 1935-Sep-28 by Van Gent, H. at Johannesburg (LS)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1935 SR1 = 1929 RK1 = 1933 GF = 1951 NG = 1952 UO1 = 1956 GG = 1958 VA = 1963 RD = 1967 GK 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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