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5575 Ryanpark (1985 RP2)
Classification: Main-belt Asteroid          SPK-ID: 2005575
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1826878300868163 5.3321e-08  
a 3.092071183093766 2.6165e-08 AU
q 2.527187408180391 1.6606e-07 AU
i .589295774242893 5.98e-06 deg
node 142.6746640682603 0.00056889 deg
peri 231.4017742007449 0.0005693 deg
M 75.69603477445683 1.6385e-05 deg
tp 2456382.916546844180
(2013-Mar-31.41654684)
8.9877e-05 JED
period 1985.969854088358
5.44
2.5208e-05
6.902e-08
d
yr
n .1812716337354752 2.3009e-09 deg/d
Q 3.656954958007141 3.0945e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1175  
   data-arc span      23368 days (63.98 yr)  
   first obs. used      1950-04-17  
   last obs. used      2014-04-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49737  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 18:13:38  

Additional Information
 Earth MOID = 1.52665 AU 
 T_jup = 3.199 
[ 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 12.7 mag n/a MPO250262  

5575 Ryanpark           Discovered 1985 Sept. 4 by H. Debehogne at the European Southern Observatory.
Sang H. ("Ryan") Park (b. 1978), a member of the Jet Propulsion Laboratory's Solar System Dynamics Group, has been instrumental in advancing JPL's planetary ephemeris and gravity science efforts. He received a NASA Exceptional Achievement medal for his contribution to the GRAIL mission.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2014-01-16Last Updated: 2014-01-21

[ show close-approach data ]
Alternate Designations
 1985 RP2 = 1979 MY 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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