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21614 Grochowski (1999 JW75)
Classification: Main-belt Asteroid          SPK-ID: 2021614
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1615345048316141 4.2133e-08  
a 2.353732633279483 7.5026e-09 au
q 1.973523597856671 9.8719e-08 au
i 6.027617400702709 3.9295e-06 deg
node 224.7052422826001 3.695e-05 deg
peri 123.1355417755588 3.8227e-05 deg
M 176.8893782438354 1.0694e-05 deg
tp 2458352.412903777119
(2018-Aug-21.91290378)
3.8425e-05 TDB
period 1318.967577118316
3.61
6.3064e-06
1.727e-08
d
yr
n .2729407502089846 1.305e-09 deg/d
Q 2.733941668702295 8.7145e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1802  
   data-arc span      17747 days (48.59 yr)  
   first obs. used      1971-09-26  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46351  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 05:23:59  

Additional Information
 Earth MOID = .975144 au 
 Jupiter MOID = 2.713 au 
 T_jup = 3.531 
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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 14.2   n/a MPO358835  
diameter diameter 3.988 km 0.172 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.279   0.062 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21614 Grochowski           Discovered 1999 May 10 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Julia Caroline Grochowski (b. 1988) was awarded second place in the 2005 Intel International Science and Engineering Fair for her medicine and health team project. She attends the Archbishop MacDonald High School, Edmonton, Alberta, Canada.
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

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Alternate Designations
 1999 JW75 = 1971 SF2 = 1978 NY2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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