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21576 McGivney (1998 SH4)
Classification: Main-belt Asteroid          SPK-ID: 2021576
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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1383466438026361 3.1858e-08  
a 3.169264644031045 1.7256e-08 au
q 2.730807517206994 1.0053e-07 au
i 2.187271079728409 4.1916e-06 deg
node 137.2167096886835 0.00010224 deg
peri 107.0259496665272 0.00010363 deg
M 70.2458691376264 1.6414e-05 deg
tp 2458798.381110067655
(2019-Nov-10.88111007)
9.4097e-05 TDB
period 2060.801612291585
5.64
1.6831e-05
4.608e-08
d
yr
n .1746893043235174 1.4267e-09 deg/d
Q 3.607721770855096 1.9644e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1624  
   data-arc span      10746 days (29.42 yr)  
   first obs. used      1991-06-06  
   last obs. used      2020-11-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50601  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:48:55  

Additional Information
 Earth MOID = 1.71721 au 
 Jupiter MOID = 1.41281 au 
 T_jup = 3.187 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456979.5 (2014-Nov-18.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1356015128791657 3.2082e-08  
q 2.740153223922039 1.0043e-07 au
tp 2456739.796946461918
(2014-Mar-23.29694646)
9.8646e-05 TDB
node 137.2759974547617 0.00010251 deg
peri 107.4957534434153 0.00010395 deg
i 2.183655854195611 4.1845e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1624  
   data-arc span      10746 days (29.42 yr)  
   first obs. used      1991-06-06  
   last obs. used      2020-11-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50601  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:48:55  

Additional Information
 Jupiter MOID = 1.41281 au 
 T_jup = 3.187 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.029269424897644E-15 -3.188437136138137E-15 -7.032625204570035E-13 3.389605474293914E-15 -1.137448501801453E-13 -3.615225877985166E-17
q -3.188437136138137E-15 1.008695086600032E-14 1.854144807317436E-12 -1.032367249349248E-14 3.026822031049476E-13 2.323188032789016E-16
tp -7.032625204570035E-13 1.854144807317436E-12 9.731090474728607E-9 -7.882654248031866E-12 1.719737229399838E-9 4.265314089229865E-13
node 3.389605474293914E-15 -1.032367249349248E-14 -7.882654248031866E-12 1.050853442149799E-8 -1.050183776543771E-8 9.864781782934192E-11
peri -1.137448501801453E-13 3.026822031049476E-13 1.719737229399838E-9 -1.050183776543771E-8 1.080492194196464E-8 -9.849297970515756E-11
i -3.615225877985166E-17 2.323188032789016E-16 4.265314089229865E-13 9.864781782934192E-11 -9.849297970515756E-11 1.750963255701031E-11

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 13.83   n/a E2021B10  
diameter diameter 8.893 km 0.433 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.081   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21576 McGivney           Discovered 1998 Sept. 19 by W. G. Dillon at Needville.
Michael J. McGivney (1852-1890), parish priest of St. Mary's Church in New Haven, Connecticut, founded the Knights of Columbus to address the plight of immigrant Catholics.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20061109/MPCPages.arcLast Updated: 2006-11-13

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Alternate Designations
 1998 SH4 = 1991 JK7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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