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21571 Naegeli (1998 RD51)
Classification: Main-belt Asteroid          SPK-ID: 2021571
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 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05709057047800716 3.3701e-08  
a 2.649270054821328 9.9302e-09 au
q 2.498021716041277 8.775e-08 au
i 5.11567689783621 3.9427e-06 deg
node 234.0610807529104 3.4893e-05 deg
peri 36.76115911266837 4.8266e-05 deg
M 138.3869802861471 3.407e-05 deg
tp 2458595.046903335040
(2019-Apr-21.54690334)
0.00014821 TDB
period 1575.026164663008
4.31
8.8554e-06
2.424e-08
d
yr
n .2285676314952046 1.2851e-09 deg/d
Q 2.800518393601379 1.0497e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2069  
   data-arc span      14330 days (39.23 yr)  
   first obs. used      1981-10-24  
   last obs. used      2021-01-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47679  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:53:20  

Additional Information
 Earth MOID = 1.48246 au 
 Jupiter MOID = 2.24104 au 
 T_jup = 3.383 
[ 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 13.69   n/a E2021B10  
diameter diameter 4.958 km 0.123 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.286   0.046 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21571 Naegeli           Discovered 1998 Sept. 14 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Kaleb Markus Naegeli (b. 1987) was awarded first place in the 2006 Intel International Science and Engineering Fair for his medicine and health project. He attends the Northwestern High School, Kokomo, Indiana, 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: 20060711/MPCPages.arcLast Updated: 2006-07-17

[ show close-approach data ]
Alternate Designations
 1998 RD51 = 1981 UA29 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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