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21694 Allisowilson (1999 RL48)
Classification: Main-belt Asteroid          SPK-ID: 2021694
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2616502516561327 6.6018e-08  
a 2.58054618175036 1.548e-08 au
q 1.905345623885105 1.7986e-07 au
i 4.080346859589977 5.6653e-06 deg
node 208.3036266498647 4.611e-05 deg
peri 217.3973882065671 4.7785e-05 deg
M 23.05791569753884 1.3313e-05 deg
tp 2459299.519721576338
(2021-Mar-26.01972158)
5.5397e-05 TDB
period 1514.139469086739
4.15
1.3625e-05
3.73e-08
d
yr
n .2377588110936279 2.1394e-09 deg/d
Q 3.255746739615614 1.9531e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1253  
   data-arc span      22792 days (62.40 yr)  
   first obs. used      1958-11-11  
   last obs. used      2021-04-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46384  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:36:15  

Additional Information
 Earth MOID = .920478 au 
 Jupiter MOID = 2.08249 au 
 T_jup = 3.372 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.83   n/a E2021B10  

21694 Allisowilson           Discovered 1999 Sept. 7 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Allison Ruth Wilson (b. 1988) was awarded second place in the 2006 Intel International Science and Engineering Fair for her biochemistry project. She attends the West Central Valley High School, Stuart, Iowa, 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

Alternate Designations
 1999 RL48 = 1958 VV = 1993 FW57 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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