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52228 Protos (1977 RN)
Classification: Outer Main-belt Asteroid          SPK-ID: 2052228
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 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1214281296313835 9.9715e-08  
a 3.208161051765479 5.8536e-08 AU
q 2.818600055693345 3.2085e-07 AU
i 27.91098254603467 1.0992e-05 deg
node 48.2543452837858 1.5113e-05 deg
peri 332.5262696216446 3.4418e-05 deg
M 137.5675688392392 2.8013e-05 deg
tp 2456198.459624910128
(2012-Sep-27.95962491)
0.00016807 JED
period 2098.856129163463
5.75
5.7443e-05
1.573e-07
d
yr
n .1715219995300414 4.6944e-09 deg/d
Q 3.597722047837613 6.5644e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      561  
   data-arc span      13356 days (36.57 yr)  
   first obs. used      1977-09-07  
   last obs. used      2014-04-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .56817  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-10 08:17:20  

Additional Information
 Earth MOID = 1.84375 AU 
 T_jup = 2.999 
[ 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 13.6 mag n/a MPO253694  

52228 Protos           Discovered 1977 Sept. 5 by L. D. Schmadel at the European Southern Observatory.
This Greek word indicates the discoverer's first minor planet detection.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20040107/MPCPages.arcLast Updated: 2004-01-07

[ show close-approach data ]
Alternate Designations
 1977 RN = 2001 SK109 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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