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21727 Rhines (1999 RY135)
Classification: Main-belt Asteroid          SPK-ID: 2021727
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .177460829397971 3.3214e-08  
a 2.328176517863817 8.1095e-09 au
q 1.915016382018824 7.7896e-08 au
i 7.309841063341564 3.4556e-06 deg
node 138.9000467525316 2.9962e-05 deg
peri 271.7836077701063 3.1505e-05 deg
M 303.3190822794909 1.0167e-05 deg
tp 2459404.794491317926
(2021-Jul-09.29449132)
3.6952e-05 TDB
period 1297.544567593369
3.55
6.7794e-06
1.856e-08
d
yr
n .2774471174178725 1.4496e-09 deg/d
Q 2.74133665370881 9.5486e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1331  
   data-arc span      11152 days (30.53 yr)  
   first obs. used      1990-01-24  
   last obs. used      2020-08-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49329  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:52:14  

Additional Information
 Earth MOID = .941272 au 
 Jupiter MOID = 2.65107 au 
 T_jup = 3.541 
[ 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 15.17   n/a E2021B10  
diameter diameter 2.137 km 0.285 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.387   0.136 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

21727 Rhines           Discovered 1999 Sept. 9 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Allison Shelton Rhines (b. 1988) was awarded second place in the 2005 Intel International Science and Engineering Fair for her medicine and health project. She attends the Oregon Episcopal School, Portland, Oregon, U.S.A.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050822/MPCPages.arcLast Updated: 2005-08-26

[ show close-approach data ]
Alternate Designations
 1999 RY135 = 1990 BG4 = 1992 RJ6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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