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4921 Volonte (1980 SJ)
Classification: Main-belt Asteroid          SPK-ID: 2004921
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1429788457387489 4.333e-08  
a 2.411737881347011 8.2189e-09 au
q 2.0669103828476 1.0337e-07 au
i 5.20828697446023 4.1332e-06 deg
node 233.1338213512864 3.38e-05 deg
peri 145.6201984557963 3.5554e-05 deg
M 199.313964458462 1.3422e-05 deg
tp 2459611.117461514505
(2022-Jan-31.61746151)
5.2756e-05 TDB
period 1368.023583408385
3.75
6.9931e-06
1.915e-08
d
yr
n .2631533581483091 1.3452e-09 deg/d
Q 2.756565379846423 9.3941e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2301  
   data-arc span      30972 days (84.80 yr)  
   first obs. used      1935-08-31  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46753  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 16:14:49  

Additional Information
 Earth MOID = 1.07185 au 
 Jupiter MOID = 2.70917 au 
 T_jup = 3.500 
[ 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 13.5   n/a MPO431554  
diameter diameter 5.084 km 0.073 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
geometric albedo albedo 0.280   0.025 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

4921 Volonte (1980 SJ)          Discovered 1980-Sep-29 by Vavrova, Z. at Klet
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1980 SJ = 1935 QM = 1954 UB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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