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21710 Nijhawan (1999 RS92)
Classification: Main-belt Asteroid          SPK-ID: 2021710
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06926502680286906 3.8898e-08  
a 2.779121059618934 1.4083e-08 au
q 2.586625164936011 1.0866e-07 au
i 1.582650246215668 3.7732e-06 deg
node 74.54817161044635 0.00016592 deg
peri 336.6784889096078 0.00016892 deg
M 165.4959243279848 3.2063e-05 deg
tp 2458422.563001702162
(2018-Oct-31.06300170)
0.00014969 TDB
period 1692.230914594583
4.63
1.2863e-05
3.522e-08
d
yr
n .2127369243140479 1.617e-09 deg/d
Q 2.971616954301857 1.5058e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1290  
   data-arc span      15914 days (43.57 yr)  
   first obs. used      1976-10-22  
   last obs. used      2020-05-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49409  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:55:23  

Additional Information
 Earth MOID = 1.59638 au 
 Jupiter MOID = 2.27455 au 
 T_jup = 3.330 
[ 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 14.75   n/a E2021B10  
diameter diameter 6.538 km 0.146 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.054   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21710 Nijhawan           Discovered 1999 Sept. 7 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Sonia Nijhawan (b. 1988) was awarded second place in the 2005 Intel International Science and Engineering Fair for her computer science project. She attends the duPont Manual Magnet High School, Louisville, Kentucky, 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

Alternate Designations
 1999 RS92 = 1976 UK6 = 1985 QQ4 = 1999 TQ279 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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