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

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1600355829190626 3.1732e-08  
a 3.162434106494025 1.222e-08 au
q 2.656332120818129 1.0005e-07 au
i .6168651035547518 3.8451e-06 deg
node 6.315244682371693 0.00031416 deg
peri 294.4107358242562 0.00031437 deg
M 73.51370388204353 1.1311e-05 deg
tp 2458581.034295736868
(2019-Apr-07.53429574)
6.4119e-05 TDB
period 2054.142908878963
5.62
1.1906e-05
3.26e-08
d
yr
n .1752555766416797 1.0158e-09 deg/d
Q 3.668536092169921 1.4176e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3266  
   data-arc span      31698 days (86.78 yr)  
   first obs. used      1933-04-14  
   last obs. used      2020-01-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44805  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:01:56  

Additional Information
 Earth MOID = 1.64086 au 
 Jupiter MOID = 1.55839 au 
 T_jup = 3.184 
[ 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 11.1   n/a MPO332831  
diameter diameter 29.661 km 0.290 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.088   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

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 | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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