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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1629974769759587 4.2376e-08  
a 3.159957483559628 1.7167e-08 au
q 2.644892386388109 1.3339e-07 au
i .622059675225809 4.637e-06 deg
node 6.520079644330788 0.0004254 deg
peri 294.766764730124 0.00042543 deg
M 187.7732387318273 1.5498e-05 deg
tp 2458582.063543642766
(2019-Apr-08.56354364)
9.2705e-05 JED
period 2051.730364720601
5.62
1.672e-05
4.578e-08
d
yr
n .1754616523643563 1.4298e-09 deg/d
Q 3.675022580731147 1.9965e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2100  
   data-arc span      30311 days (82.99 yr)  
   first obs. used      1933-04-14  
   last obs. used      2016-04-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50599  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 12:35:30  

Additional Information
 Earth MOID = 1.62909 au 
 Jupiter MOID = 1.54623 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 11.1 mag n/a MPO332831  

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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