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120456 (1989 JB)
Classification: Main-belt Asteroid          SPK-ID: 2120456
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2330575235829944 5.8038e-08  
a 2.272469487500423 1.2662e-08 au
q 1.742853376325658 1.3224e-07 au
i 25.84485939233151 6.34e-06 deg
node 82.72493175412762 1.1111e-05 deg
peri 138.7800542977696 1.7294e-05 deg
M 84.11525806617736 1.4657e-05 deg
tp 2458908.140103973102
(2020-Feb-28.64010397)
4.9518e-05 TDB
period 1251.254112385632
3.43
1.0458e-05
2.863e-08
d
yr
n .2877113421138944 2.4046e-09 deg/d
Q 2.802085598675188 1.5613e-08 au
  Orbit Determination Parameters
   # obs. used (total)      652  
   data-arc span      15916 days (43.58 yr)  
   first obs. used      1976-11-18  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53138  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 17:57:03  

Additional Information
 Earth MOID = .776407 au 
 Jupiter MOID = 2.34453 au 
 T_jup = 3.446 
[ 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 15.2   n/a MPO366575  
diameter diameter 2.255 km 0.430 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.381   0.077 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

120456 (1989 JB)          Discovered 1989-May-03 by Helin, E. F. at Palomar
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

[ show close-approach data ]
Alternate Designations
 1989 JB = 1999 AB26 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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