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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1838295771062626 5.3061e-08  
a 3.0921629142211 2.7134e-08 AU
q 2.523731913356166 1.6575e-07 AU
i .5915503983588792 5.9854e-06 deg
node 142.6217714096282 0.00055128 deg
peri 231.4878475795911 0.00055167 deg
M 111.7816793525642 1.6184e-05 deg
tp 2456383.819654855191
(2013-Apr-01.31965486)
8.8249e-05 JED
period 1986.05823009617
5.44
2.6142e-05
7.157e-08
d
yr
n .1812635674748408 2.3859e-09 deg/d
Q 3.660593915086033 3.2122e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1194  
   data-arc span      23609 days (64.64 yr)  
   first obs. used      1950-04-17  
   last obs. used      2014-12-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5001  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jan-08 00:12:45  

Additional Information
 Earth MOID = 1.52454 AU 
 T_jup = 3.198 
[ 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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