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70021 (1999 AB)
Classification: Main-belt Asteroid          SPK-ID: 2070021
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06255474508283504 5.03e-08  
a 3.185878605473656 2.3293e-08 au
q 2.986586781443394 1.6917e-07 au
i 21.3085995053648 5.0127e-06 deg
node 292.147912536117 1.579e-05 deg
peri 154.5640546453922 5.9145e-05 deg
M 299.8002404944901 5.5391e-05 deg
tp 2459547.823778928442
(2021-Nov-29.32377893)
0.00032024 TDB
period 2077.027573553594
5.69
2.2778e-05
6.236e-08
d
yr
n .1733246128187286 1.9008e-09 deg/d
Q 3.385170429503918 2.475e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1284  
   data-arc span      24920 days (68.23 yr)  
   first obs. used      1952-10-22  
   last obs. used      2021-01-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47731  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 12:46:32  

Additional Information
 Earth MOID = 2.01229 au 
 Jupiter MOID = 1.78537 au 
 T_jup = 3.088 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457682.5 (2016-Oct-21.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06022507558784061 4.8986e-08  
q 2.997036525730415 1.642e-07 au
tp 2457450.465674931101
(2016-Mar-02.96567493)
0.00033674 TDB
node 292.358394404327 1.5817e-05 deg
peri 151.4818296844529 6.2386e-05 deg
i 21.26038474271176 5.012e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1284  
   data-arc span      24920 days (68.23 yr)  
   first obs. used      1952-10-22  
   last obs. used      2021-01-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47731  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 12:46:32  

Additional Information
 Jupiter MOID = 1.78537 au 
 T_jup = 3.088 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.399630983568754E-15 -7.979235447579748E-15 2.553188990035661E-12 9.049900290698013E-15 5.597234556704629E-13 -1.527117769031113E-16
q -7.979235447579748E-15 2.696300195459357E-14 -7.171743497501211E-12 -2.511295354586773E-14 -1.624284382639891E-12 4.765288744630474E-15
tp 2.553188990035661E-12 -7.171743497501211E-12 1.133927559756752E-7 1.031075970378775E-11 2.036177253975332E-8 1.017978689826147E-10
node 9.049900290698013E-15 -2.511295354586773E-14 1.031075970378775E-11 2.501683639665676E-10 -2.309484420397817E-10 1.848248917399391E-11
peri 5.597234556704629E-13 -1.624284382639891E-12 2.036177253975332E-8 -2.309484420397817E-10 3.891970765957623E-9 7.272339268962068E-13
i -1.527117769031113E-16 4.765288744630474E-15 1.017978689826147E-10 1.848248917399391E-11 7.272339268962068E-13 2.512046295015042E-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 13.84   n/a E2021B10  
diameter diameter 10.881 km 0.112 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.061   0.001 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

70021 (1999 AB)          Discovered 1999-Jan-03 by Kobayashi, T. at Oizumi
Reference: 20031109/Numbers.arcLast Updated: 2004-04-19

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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