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21350 Billgardner (1997 EN32)
Classification: Main-belt Asteroid          SPK-ID: 2021350
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09171239060386309 4.1879e-08  
a 2.720143606230428 1.3113e-08 au
q 2.470672733317222 1.1602e-07 au
i 4.032780353826395 6.0176e-06 deg
node 6.02691611607199 5.6323e-05 deg
peri 69.27352852900738 6.5475e-05 deg
M 158.4420725065606 3.3642e-05 deg
tp 2458279.302538175249
(2018-Jun-09.80253818)
0.00015121 TDB
period 1638.64989992579
4.49
1.1849e-05
3.244e-08
d
yr
n .2196930534193444 1.5886e-09 deg/d
Q 2.969614479143634 1.4315e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1157  
   data-arc span      10372 days (28.40 yr)  
   first obs. used      1992-01-30  
   last obs. used      2020-06-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54079  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:57:31  

Additional Information
 Earth MOID = 1.48917 au 
 Jupiter MOID = 2.23804 au 
 T_jup = 3.349 
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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 14.8   n/a MPO337438  
diameter diameter 3.189 km 0.480 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.229   0.103 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21350 Billgardner           Discovered 1997 Mar. 11 by Spacewatch at Kitt Peak.
William David Anstruther Gardner (b. 1974) is an amateur astronomer in Ingersoll, Ontario, active in the Royal Astronomical Society of Canada, London Centre. Name suggested by R. and P. Jedicke.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2016-06-20Last Updated: 2016-06-21

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Alternate Designations
 1997 EN32 = 1999 RB95 
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