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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1219105871633566 9.8159e-08  
a 3.206572803402574 5.1093e-08 au
q 2.815657630157716 3.1086e-07 au
i 27.92115630782593 9.7378e-06 deg
node 48.23564925291693 1.4763e-05 deg
peri 332.3675742775867 2.8228e-05 deg
M 206.4159688200337 2.4619e-05 deg
tp 2458295.253994191336
(2018-Jun-25.75399419)
0.00014867 JED
period 2097.297716658043
5.74
5.0127e-05
1.372e-07
d
yr
n .1716494502142715 4.1026e-09 deg/d
Q 3.597487976647432 5.7322e-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 = 1.83995 au 
 Jupiter MOID = 1.8651 au 
 T_jup = 3.000 
[ 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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