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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 ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 210 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6576475526553485 3.0601e-08  
a 1.621304411292465 1.9391e-09 au
q .5550575330966551 4.9845e-08 au
i 24.38839421041888 1.5606e-06 deg
node 77.7002851361826 7.1729e-06 deg
peri 77.75554923244019 6.8245e-06 deg
M 70.31146281640669 5.3453e-06 deg
tp 2459249.228433598930
(2021-Feb-03.72843360)
1.0986e-05 TDB
period 754.0415428821624
2.06
1.3528e-06
3.704e-09
d
yr
n .4774272762532116 8.5652e-10 deg/d
Q 2.687551289488276 3.2144e-09 au
  Orbit Determination Parameters
   # obs. used (total)      981  
   # delay obs. used      0  
   # Doppler obs. used      2  
   data-arc span      17130 days (46.90 yr)  
   first obs. used      1974-07-21  
   last obs. used      2021-06-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44284  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jun-17 06:21:36  

Additional Information
 Earth MOID = .0261835 au 
 Jupiter MOID = 2.72835 au 
 T_jup = 3.975 
[ 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 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

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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