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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1220505732759338 9.4039e-08  
a 3.206399109318439 4.9499e-08 au
q 2.815056259874679 3.0052e-07 au
i 27.92207053204608 9.6716e-06 deg
node 48.23566070729229 1.4342e-05 deg
peri 332.3363650814751 2.7619e-05 deg
M 240.7956473345599 2.4695e-05 deg
tp 2458294.907509204015
(2018-Jun-25.40750920)
0.00014841 JED
period 2097.127308891648
5.74
4.8562e-05
1.33e-07
d
yr
n .1716633980558212 3.9751e-09 deg/d
Q 3.597741958762198 5.5541e-08 au
  Orbit Determination Parameters
   # obs. used (total)      626  
   data-arc span      14090 days (38.58 yr)  
   first obs. used      1977-09-07  
   last obs. used      2016-04-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .59166  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 14:37:42  

Additional Information
 Earth MOID = 1.8393 au 
 Jupiter MOID = 1.8637 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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