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21934 (1999 VY71)
Classification: Main-belt Asteroid          SPK-ID: 2021934
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 46 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .10816135101908 3.0713e-08  
a 2.650363349435067 9.7563e-09 au
q 2.363696468868716 8.5078e-08 au
i 12.7518680682993 3.1324e-06 deg
node 153.5739303043143 1.6337e-05 deg
peri 311.2047695909973 2.3727e-05 deg
M 312.4924293959401 1.7356e-05 deg
tp 2459408.477749507872
(2021-Jul-12.97774951)
7.6143e-05 TDB
period 1576.001232452741
4.31
8.7022e-06
2.383e-08
d
yr
n .2284262173067781 1.2613e-09 deg/d
Q 2.937030230001418 1.0812e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2463  
   data-arc span      11995 days (32.84 yr)  
   first obs. used      1988-05-19  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39379  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 03:16:56  

Additional Information
 Earth MOID = 1.39955 au 
 Jupiter MOID = 2.18069 au 
 T_jup = 3.347 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457287.5 (2015-Sep-22.0) TDB
Reference: JPL 46 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1065699821330277 3.0563e-08  
q 2.369297125661356 8.4558e-08 au
tp 2457827.792092161242
(2017-Mar-15.29209216)
7.6947e-05 TDB
node 153.7263074748728 1.6337e-05 deg
peri 310.2247859520696 2.3976e-05 deg
i 12.7477650942333 3.1334e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2463  
   data-arc span      11995 days (32.84 yr)  
   first obs. used      1988-05-19  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39379  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 03:16:56  

Additional Information
 Jupiter MOID = 2.18069 au 
 T_jup = 3.347 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.341115854350819E-16 -2.572407968740874E-15 -5.122005684140248E-13 3.013016724833314E-16 -8.16971666836877E-14 -1.458947562663916E-15
q -2.572407968740874E-15 7.15002286014274E-15 1.382228589040021E-12 -6.973384219285698E-17 2.124624186751278E-13 4.431783295152397E-15
tp -5.122005684140248E-13 1.382228589040021E-12 5.92079246951525E-9 -7.543052395223546E-12 1.363247414187517E-9 4.081062913115618E-12
node 3.013016724833314E-16 -6.973384219285698E-17 -7.543052395223546E-12 2.66890704625655E-10 -2.618644076034504E-10 1.157491680508421E-11
peri -8.16971666836877E-14 2.124624186751278E-13 1.363247414187517E-9 -2.618644076034504E-10 5.748411916271706E-10 -1.044545221331523E-11
i -1.458947562663916E-15 4.431783295152397E-15 4.081062913115618E-12 1.157491680508421E-11 -1.044545221331523E-11 9.818418307575732E-12

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.14   n/a MPCxxxxx  
diameter diameter 6.920 km 0.158 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.233   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21934 (1999 VY71)          Discovered 1999-Nov-07 by Beijing Schmidt CCD Asteroid Program at Xinglong
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 VY71 = 1998 RP34 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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