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21671 Warrener (1999 RP12)
Classification: Main-belt Asteroid          SPK-ID: 2021671
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05115953393557548 3.506e-08  
a 2.603894321979292 1.1904e-08 au
q 2.47068030204934 8.9788e-08 au
i 14.66408260589001 3.6595e-06 deg
node 175.4478536355601 1.5344e-05 deg
peri 328.8049588078085 4.3907e-05 deg
M 174.4654572704658 4.2966e-05 deg
tp 2458256.726996184550
(2018-May-18.22699618)
0.00018163 TDB
period 1534.735216716674
4.20
1.0524e-05
2.881e-08
d
yr
n .2345681496578698 1.6085e-09 deg/d
Q 2.737108341909245 1.2513e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1563  
   data-arc span      13862 days (37.95 yr)  
   first obs. used      1982-08-21  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48831  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 01:46:06  

Additional Information
 Earth MOID = 1.48773 au 
 Jupiter MOID = 2.25001 au 
 T_jup = 3.365 
[ 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 13.8   n/a MPO337441  
diameter diameter 4.197 km 0.129 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 4.516737 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.252   0.070 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21671 Warrener           Discovered 1999 Sept. 7 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Stephen Gerald Warrener (b. 1987) was awarded second place in the 2006 Intel International Science and Engineering Fair for his engineering project. He attends the East Noble High School, Kendallville, 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
 1999 RP12 = 1982 QW3 = 1989 EZ5 = 1998 KO49 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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