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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 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1214281276763309 9.9348e-08  
a 3.2081610523397 5.8478e-08 AU
q 2.818600062469963 3.1947e-07 AU
i 27.9109810193767 1.0923e-05 deg
node 48.25434651286926 1.5081e-05 deg
peri 332.526268183194 3.4381e-05 deg
M 137.5675690634825 2.7998e-05 deg
tp 2456198.459623387422
(2012-Sep-27.95962339)
0.00016796 JED
period 2098.856129726967
5.75
5.7387e-05
1.571e-07
d
yr
n .171521999483991 4.6897e-09 deg/d
Q 3.597722042209437 6.5579e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      565  
   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      .56851  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Mar-09 16:38:42  

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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