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22473 Stanleyhey (1997 EN4)
Classification: Main-belt Asteroid          SPK-ID: 2022473
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1977218437773958 4.6441e-08  
a 2.635463771180013 1.2506e-08 au
q 2.114375015133772 1.1851e-07 au
i 12.06060594972447 5.1233e-06 deg
node 2.101034020627632 1.9497e-05 deg
peri 327.7050787776478 2.3494e-05 deg
M 62.95588785877532 1.4244e-05 deg
tp 2458927.213703682396
(2020-Mar-18.71370368)
6.1268e-05 TDB
period 1562.730191257622
4.28
1.1123e-05
3.045e-08
d
yr
n .230366061917756 1.6397e-09 deg/d
Q 3.156552527226254 1.4979e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1339  
   data-arc span      8742 days (23.93 yr)  
   first obs. used      1997-03-02  
   last obs. used      2021-02-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43937  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:06:46  

Additional Information
 Earth MOID = 1.1131 au 
 Jupiter MOID = 2.26472 au 
 T_jup = 3.339 
[ show covariance matrix ]

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 14.65   n/a E2021B10  
diameter diameter 6.711 km 0.148 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.057   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

22473 Stanleyhey           Discovered 1997 Mar. 2 by Spacewatch at Kitt Peak.
James Stanley Hey (1909-2000) was a British radar engineer. In 1942 February, Hey was first to identify radio waves coming from a solar flare. Name suggested and citation prepared by Robert Jedicke and Peter 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 2016-08-18Last Updated: 2016-11-23

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