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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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1214281385563438 9.8142e-08  
a 3.208161034856053 5.1538e-08 AU
q 2.818600012204489 3.111e-07 AU
i 27.91097913310693 9.7357e-06 deg
node 48.25434524817987 1.4767e-05 deg
peri 332.5262815309422 2.8305e-05 deg
M 137.567560376452 2.4463e-05 deg
tp 2456198.459680590532
(2012-Sep-27.95968059)
0.00014197 JED
period 2098.856112569634
5.75
5.0576e-05
1.385e-07
d
yr
n .1715220008861166 4.1331e-09 deg/d
Q 3.597722057507617 5.7796e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      621  
   data-arc span      13759 days (37.67 yr)  
   first obs. used      1977-09-07  
   last obs. used      2015-05-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .58967  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 17:54:39  

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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