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4953 (1990 MU)
Classification: Apollo [NEO, PHA]          SPK-ID: 2004953
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 217 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6576475535715883 3.0545e-08  
a 1.621304411250426 1.9372e-09 au
q .5550575315967591 4.9753e-08 au
i 24.3883942019363 1.5595e-06 deg
node 77.70028505106691 7.1644e-06 deg
peri 77.75554925329473 6.8159e-06 deg
M 70.31146296117571 5.3368e-06 deg
tp 2459249.228433301431
(2021-Feb-03.72843330)
1.0968e-05 TDB
period 754.0415428528348
2.06
1.3514e-06
3.7e-09
d
yr
n .4774272762717806 8.5566e-10 deg/d
Q 2.687551290904094 3.2112e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1005  
   # delay obs. used      0  
   # Doppler obs. used      2  
   data-arc span      17165 days (47.00 yr)  
   first obs. used      1974-07-21  
   last obs. used      2021-07-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44465  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-20 05:49:21  

Additional Information
 Earth MOID = .0261835 au 
 Jupiter MOID = 2.72835 au 
 T_jup = 3.975 
[ hide covariance matrix ]
Orbital Elements at Epoch 2458104.5 (2017-Dec-17.0) TDB
Reference: JPL 217 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6575084022787498 3.0504e-08  
q .5552305063987343 4.9707e-08 au
tp 2457741.435633312870
(2016-Dec-18.93563331)
9.0462e-06 TDB
node 77.72083800856674 7.1611e-06 deg
peri 77.77171598098326 6.8187e-06 deg
i 24.38812279315486 1.5608e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1005  
   # delay obs. used      0  
   # Doppler obs. used      2  
   data-arc span      17165 days (47.00 yr)  
   first obs. used      1974-07-21  
   last obs. used      2021-07-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44465  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-20 05:49:21  

Additional Information
 Jupiter MOID = 2.72835 au 
 T_jup = 3.975 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.304726817797189E-16 -1.516156093076386E-15 -1.867032231264454E-13 -1.000254514836905E-15 -5.770885224573371E-14 6.603157209373379E-15
q -1.516156093076386E-15 2.470821341405216E-15 3.062992989458915E-13 2.854576809849832E-15 9.315793561367149E-14 -1.052017317834106E-14
tp -1.867032231264454E-13 3.062992989458915E-13 8.183419278591637E-11 6.159061547693634E-12 1.247006353937987E-11 -3.871028566362619E-13
node -1.000254514836905E-15 2.854576809849832E-15 6.159061547693634E-12 5.128095933232195E-11 -4.618585900195247E-11 1.000326614484661E-11
peri -5.770885224573371E-14 9.315793561367149E-14 1.247006353937987E-11 -4.618585900195247E-11 4.649475029030505E-11 -9.579773536941763E-12
i 6.603157209373379E-15 -1.052017317834106E-14 -3.871028566362619E-13 1.000326614484661E-11 -9.579773536941763E-12 2.435999319987669E-12

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 15.02   n/a E2021B10  
rotation period rot_per 14.218 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Mottola, S.; De Angelis, G.; Di Martino, M.; Erikson, A.; et al. (1995) Icarus 117, 62-70; Mottola, S.; De Angelis, G.; Di Martino, M.; Erikson, A.; Harris, A.W.; Hahn, G.; Neukum, G.; Pravec, M.; Wolf, M. (1995) Lunar & Planetary Science XXVI, 1003-1004.]

4953 (1990 MU)          Discovered 1990-Jun-23 by McNaught, R. H. at Siding Spring
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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