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74321 (1998 UT21)
Classification: Main-belt Asteroid          SPK-ID: 2074321
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1661839653872094 4.8363e-08  
a 2.76219196151513 2.0321e-08 au
q 2.303159948189871 1.3837e-07 au
i 9.916391705990135 5.7879e-06 deg
node 49.04078358570415 2.5093e-05 deg
peri 321.7007578062757 2.8492e-05 deg
M 258.3560122104465 1.5313e-05 deg
tp 2459473.932869713705
(2021-Sep-16.43286971)
7.3992e-05 TDB
period 1676.79207401631
4.59
1.8504e-05
5.066e-08
d
yr
n .2146956713229897 2.3692e-09 deg/d
Q 3.221223974840389 2.3698e-08 au
  Orbit Determination Parameters
   # obs. used (total)      603  
   data-arc span      9863 days (27.00 yr)  
   first obs. used      1992-04-27  
   last obs. used      2019-04-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55564  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 07:34:41  

Additional Information
 Earth MOID = 1.31341 au 
 Jupiter MOID = 2.26221 au 
 T_jup = 3.299 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456761.5 (2014-Apr-14.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1661977710592028 4.8481e-08  
q 2.302494497378603 1.3874e-07 au
tp 2456125.152070714415
(2012-Jul-16.65207071)
6.2851e-05 TDB
node 49.06167060450715 2.5082e-05 deg
peri 322.3285117746046 2.8468e-05 deg
i 9.919262644809862 5.7895e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      603  
   data-arc span      9863 days (27.00 yr)  
   first obs. used      1992-04-27  
   last obs. used      2019-04-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55564  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 07:34:41  

Additional Information
 Jupiter MOID = 2.26221 au 
 T_jup = 3.299 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.350416217635837E-15 -6.676719245909394E-15 6.122644727874052E-13 5.53803778108121E-15 1.182240526963162E-13 -3.086032178192733E-15
q -6.676719245909394E-15 1.924742913541758E-14 -1.679532040610078E-12 -1.739920293728244E-14 -3.007082766186932E-13 1.008078041007282E-14
tp 6.122644727874052E-13 -1.679532040610078E-12 3.950187227046625E-9 -1.027580908058389E-13 8.584283980718042E-10 3.258323550742538E-12
node 5.53803778108121E-15 -1.739920293728244E-14 -1.027580908058389E-13 6.291222501471213E-10 -6.19629349921845E-10 -2.742485121854049E-11
peri 1.182240526963162E-13 -3.007082766186932E-13 8.584283980718042E-10 -6.19629349921845E-10 8.104121081503462E-10 2.783897509665152E-11
i -3.086032178192733E-15 1.008078041007282E-14 3.258323550742538E-12 -2.742485121854049E-11 2.783897509665152E-11 3.351843940550236E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.8   n/a MPO474629  

74321 (1998 UT21)          Discovered 1998-Oct-28 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 UT21 = 2000 BE24 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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