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21898 (1999 VJ7)
Classification: Main-belt Asteroid          SPK-ID: 2021898
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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1428611773820062 3.3838e-08  
a 3.131263162935674 1.8555e-08 au
q 2.683927220785779 1.0921e-07 au
i 9.220887280677246 3.8704e-06 deg
node 48.29721353161971 2.3844e-05 deg
peri 13.02244881385873 2.9295e-05 deg
M 316.0864823231806 2.0348e-05 deg
tp 2459643.372950137545
(2022-Mar-04.87295014)
0.00011574 TDB
period 2023.847479119854
5.54
1.7989e-05
4.925e-08
d
yr
n .1778790169289632 1.5811e-09 deg/d
Q 3.578599105085569 2.1206e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1627  
   data-arc span      11968 days (32.77 yr)  
   first obs. used      1988-11-02  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49716  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:46:13  

Additional Information
 Earth MOID = 1.69707 au 
 Jupiter MOID = 1.79144 au 
 T_jup = 3.177 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457404.5 (2016-Jan-17.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1487336120019453 3.5032e-08  
q 2.663445269448506 1.1463e-07 au
tp 2457604.894539404588
(2016-Aug-04.39453940)
9.7602e-05 TDB
node 48.71549924270122 2.3628e-05 deg
peri 10.53741799652855 2.8513e-05 deg
i 9.276450808065333 3.8882e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1627  
   data-arc span      11968 days (32.77 yr)  
   first obs. used      1988-11-02  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49716  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:46:13  

Additional Information
 Jupiter MOID = 1.79144 au 
 T_jup = 3.177 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.227258400248211E-15 -3.978794055631912E-15 -9.90110361375046E-13 -2.26029321045829E-15 -1.471215486888238E-13 5.498439512087833E-16
q -3.978794055631912E-15 1.313892105338802E-14 4.00472843273217E-12 8.11788904325903E-15 6.002634959928242E-13 -1.343685183105409E-15
tp -9.90110361375046E-13 4.00472843273217E-12 9.526168348302387E-9 -6.017613669192133E-12 1.578621018885984E-9 3.917858536696836E-12
node -2.26029321045829E-15 8.11788904325903E-15 -6.017613669192133E-12 5.582899099778371E-10 -5.517364232253617E-10 -7.827289560557076E-12
peri -1.471215486888238E-13 6.002634959928242E-13 1.578621018885984E-9 -5.517364232253617E-10 8.130034616566875E-10 8.383403224338726E-12
i 5.498439512087833E-16 -1.343685183105409E-15 3.917858536696836E-12 -7.827289560557076E-12 8.383403224338726E-12 1.511783679875028E-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 13.21   n/a MPO636392  
diameter diameter 12.909 km 0.023 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.031   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

21898 (1999 VJ7)          Discovered 1999-Nov-07 by Korlevic, K. at Visnjan
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1999 VJ7 = 1988 VY5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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