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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 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3503982926326742 1.242e-07  
a 2.777970722396625 2.8274e-08 AU
q 1.804574524285291 3.5093e-07 AU
i 9.812416808688042 1.5467e-05 deg
node 348.1528803483208 5.8823e-05 deg
peri 5.540922531655112 6.2338e-05 deg
M 232.2718259442276 2.1625e-05 deg
tp 2457600.531605086635
(2016-Jul-31.03160509)
0.00010903 JED
period 1691.180347860193
4.63
2.5819e-05
7.069e-08
d
yr
n .2128690771835769 3.2499e-09 deg/d
Q 3.75136692050796 3.8182e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      185  
   data-arc span      14535 days (39.79 yr)  
   first obs. used      1974-06-23  
   last obs. used      2014-04-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53449  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-11 12:11:58  

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 15.3 mag n/a MPO251379  

168317 (1988 RY4)          Discovered 1988-Sep-02 by Debehogne, H. at La Silla (809)
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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