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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1634344862091356 5.1241e-08  
a 3.160504898125259 2.0579e-08 AU
q 2.643969403938701 1.6676e-07 AU
i .6221465516780613 5.3589e-06 deg
node 6.51367636902928 0.00048729 deg
peri 294.959696201997 0.00048733 deg
M 47.14969006545687 1.5328e-05 deg
tp 2456531.712251164791
(2013-Aug-27.21225116)
8.6416e-05 JED
period 2052.263534422822
5.62
2.0044e-05
5.488e-08
d
yr
n .1754160681421679 1.7133e-09 deg/d
Q 3.677040392311818 2.3942e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1659  
   data-arc span      29663 days (81.21 yr)  
   first obs. used      1933-04-14  
   last obs. used      2014-07-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52883  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 12:00:13  

Additional Information
 Earth MOID = 1.62774 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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