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4439 Muroto (1984 VA)
Classification: Main-belt Asteroid          SPK-ID: 2004439
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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2672900701537662 3.238e-08  
a 3.090344379433674 1.568e-08 au
q 2.26432601345555 1.0059e-07 au
i 2.292216974540652 4.1481e-06 deg
node 51.89232242491876 0.00010116 deg
peri 17.73744816782139 0.00010151 deg
M 279.9151141675547 1.0142e-05 deg
tp 2459837.924877271890
(2022-Sep-15.42487727)
5.8336e-05 TDB
period 1984.306453908922
5.43
1.5102e-05
4.135e-08
d
yr
n .1814235897337477 1.3808e-09 deg/d
Q 3.916362745411798 1.9871e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1645  
   data-arc span      24559 days (67.24 yr)  
   first obs. used      1954-04-08  
   last obs. used      2021-07-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48737  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 13:34:48  

Additional Information
 Earth MOID = 1.27856 au 
 Jupiter MOID = 1.40816 au 
 T_jup = 3.168 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456696.5 (2014-Feb-08.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2759777861920238 3.2043e-08  
q 2.22453305524424 9.9451e-08 au
tp 2455893.200573565394
(2011-Nov-27.70057357)
4.1494e-05 TDB
node 52.27887637090496 0.00010011 deg
peri 17.38499822480127 0.00010042 deg
i 2.309627502601896 4.1798e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1645  
   data-arc span      24559 days (67.24 yr)  
   first obs. used      1954-04-08  
   last obs. used      2021-07-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48737  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 13:34:48  

Additional Information
 Jupiter MOID = 1.40816 au 
 T_jup = 3.168 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.026754804393063E-15 -3.169005108291432E-15 -2.898632158585907E-13 -1.18356255143154E-15 -7.898019160585701E-14 -4.697933575257794E-17
q -3.169005108291432E-15 9.890447793753314E-15 9.942497445656229E-13 4.528967943050358E-15 2.698337371022729E-13 1.222818720067105E-16
tp -2.898632158585907E-13 9.942497445656229E-13 1.721777437789188E-9 2.368367331178004E-12 3.492211726920157E-10 -2.788298772888522E-13
node -1.18356255143154E-15 4.528967943050358E-15 2.368367331178004E-12 1.002120144860954E-8 -1.00122723684331E-8 -1.073293721060737E-10
peri -7.898019160585701E-14 2.698337371022729E-13 3.492211726920157E-10 -1.00122723684331E-8 1.008432794007932E-8 1.071862908360036E-10
i -4.697933575257794E-17 1.222818720067105E-16 -2.788298772888522E-13 -1.073293721060737E-10 1.071862908360036E-10 1.74709351347154E-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 13.29   n/a E2021B10  
diameter diameter 12.184 km 0.213 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 8.31429 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.068   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4439 Muroto (1984 VA)          Discovered 1984-Nov-02 by Seki, T. at Geisei
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1984 VA = 1975 EN1 = 1980 BH3 = 2019 GN26 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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