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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2328537240936464 6.1956e-08  
a 2.272613462587127 1.3233e-08 au
q 1.743426954398358 1.4215e-07 au
i 25.84962028183439 6.3459e-06 deg
node 82.7351338766199 1.1285e-05 deg
peri 138.8184779500777 1.7442e-05 deg
M 26.55533014478263 1.5255e-05 deg
tp 2458908.192711528823
(2020-Feb-28.69271153)
5.2526e-05 TDB
period 1251.373026373485
3.43
1.093e-05
2.992e-08
d
yr
n .2876840018226144 2.5128e-09 deg/d
Q 2.801799970775897 1.6315e-08 au
  Orbit Determination Parameters
   # obs. used (total)      635  
   data-arc span      15866 days (43.44 yr)  
   first obs. used      1976-11-18  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53784  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 20:37:44  

Additional Information
 Earth MOID = .778307 au 
 Jupiter MOID = 2.3457 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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