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21649 Vardhana (1999 NQ59)
Classification: Main-belt Asteroid          SPK-ID: 2021649
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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1982849172109032 3.598e-08  
a 2.727222322620167 1.2661e-08 au
q 2.1864552701637 9.7629e-08 au
i 14.47491103597043 4.2617e-06 deg
node 162.758241305114 1.4293e-05 deg
peri 151.2245371842205 1.6804e-05 deg
M 267.1074957693481 9.4134e-06 deg
tp 2459624.980174807727
(2022-Feb-14.48017481)
4.4067e-05 TDB
period 1645.050525835192
4.50
1.1456e-05
3.136e-08
d
yr
n .2188382632303819 1.524e-09 deg/d
Q 3.267989375076634 1.5172e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1216  
   data-arc span      14469 days (39.61 yr)  
   first obs. used      1981-07-26  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52016  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:51:10  

Additional Information
 Earth MOID = 1.18264 au 
 Jupiter MOID = 2.13639 au 
 T_jup = 3.282 
[ 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 14.49   n/a E2021B10  
diameter diameter 3.739 km 0.654 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.152   0.049 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21649 Vardhana           Discovered 1999 July 13 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Anarghya A. Vardhana (b. 1988) was awarded second place in the 2006 Intel International Science and Engineering Fair for her mathematics project. She attends the Jesuit High 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: 20060711/MPCPages.arcLast Updated: 2006-07-17

[ show close-approach data ]
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