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168317 (1988 RY4)
Classification: Main-belt Asteroid          SPK-ID: 2168317
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 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3503982815088216 9.5785e-08  
a 2.777970722000651 2.8237e-08 AU
q 1.804574554929803 2.7299e-07 AU
i 9.812404817988684 1.1456e-05 deg
node 348.1529100293344 5.1638e-05 deg
peri 5.540895322366182 5.4103e-05 deg
M 232.2718247221317 2.0337e-05 deg
tp 2457600.531610699410
(2016-Jul-31.03161070)
0.00010327 JED
period 1691.1803474986
4.63
2.5785e-05
7.06e-08
d
yr
n .2128690772290907 3.2456e-09 deg/d
Q 3.7513668890715 3.8131e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      210  
   data-arc span      14936 days (40.89 yr)  
   first obs. used      1974-06-23  
   last obs. used      2015-05-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52182  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 22:04:14  

Additional Information
 Earth MOID = .799965 AU 
 T_jup = 3.222 
[ 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 15.4 mag n/a MPO338354  

168317 (1988 RY4)          Discovered 1988-Sep-02 by Debehogne, H. at La Silla
Reference: 20071124/Numbers.arcLast Updated: 2007-11-26

[ show close-approach data ]
Alternate Designations
 1988 RY4 = 2002 TU182 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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