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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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02635496311486568 3.5829e-08  
a 2.624914459348819 1.1893e-08 au
q 2.555734935593003 9.4241e-08 au
i 3.794440584089263 4.0795e-06 deg
node 58.37164672535803 6.0533e-05 deg
peri 178.9625025121546 0.00010885 deg
M 147.8700152905401 9.253e-05 deg
tp 2458562.458721383318
(2019-Mar-19.95872138)
0.00039761 TDB
period 1553.356573681913
4.25
1.0557e-05
2.89e-08
d
yr
n .2317561892094703 1.5751e-09 deg/d
Q 2.694093983104635 1.2207e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1355  
   data-arc span      15438 days (42.27 yr)  
   first obs. used      1978-11-29  
   last obs. used      2021-03-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50811  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:55:48  

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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