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21929 Nileshraval (1999 VP56)
Classification: Main-belt Asteroid          SPK-ID: 2021929
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 .02635496324313069 3.583e-08  
a 2.62491445917091 1.1898e-08 au
q 2.555734935083098 9.4245e-08 au
i 3.794440556417914 4.0796e-06 deg
node 58.37164961697942 6.0607e-05 deg
peri 178.9624991781434 0.00010891 deg
M 147.8700157469185 9.2544e-05 deg
tp 2458562.458719478967
(2019-Mar-19.95871948)
0.00039767 TDB
period 1553.35657352399
4.25
1.0561e-05
2.891e-08
d
yr
n .231756189233032 1.5757e-09 deg/d
Q 2.694093983258721 1.2212e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1349  
   data-arc span      15385 days (42.12 yr)  
   first obs. used      1978-11-29  
   last obs. used      2021-01-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50709  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:55:08  

Additional Information
 Earth MOID = 1.54176 au 
 Jupiter MOID = 2.27638 au 
 T_jup = 3.399 
[ 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 14.76   n/a E2021B10  
diameter diameter 5.153 km 0.219 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.139   0.039 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21929 Nileshraval           Discovered 1999 Nov. 4 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Nilesh Kaushik Raval (b. 1992) is a finalist in the 2005 Discovery Channel Young Scientist Challenge (DCYSC), a middle school science competition, for his biochemistry, medicine, health, & microbiology project. He attends the Saginaw Arts and Sciences Academy, Saginaw, Michigan.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20051019/MPCPages.arcLast Updated: 2005-10-26

Alternate Designations
 1999 VP56 = 1978 WU6 = 1992 AK4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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