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52228 Protos (1977 RN)
Classification: Outer Main-belt Asteroid          SPK-ID: 2052228
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1230349304482193 6.5197e-08  
a 3.206856782084683 2.8446e-08 au
q 2.812301380943494 1.9919e-07 au
i 27.92021858646785 5.3564e-06 deg
node 48.20994453366304 9.0656e-06 deg
peri 331.9642125838108 1.8716e-05 deg
M 155.6794607813413 1.7016e-05 deg
tp 2458293.417910083438
(2018-Jun-23.91791008)
9.558e-05 TDB
period 2097.576332362917
5.74
2.791e-05
7.641e-08
d
yr
n .1716266504563676 2.2836e-09 deg/d
Q 3.601412183225873 3.1946e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1210  
   data-arc span      15905 days (43.55 yr)  
   first obs. used      1977-09-06  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52492  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 06:17:29  

Additional Information
 Earth MOID = 1.83748 au 
 Jupiter MOID = 1.86408 au 
 T_jup = 2.999 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.59   n/a MPCxxxxx  
diameter diameter 5.589 km 1.622 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.271   0.176 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

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 | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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