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2549 Baker (1976 UB)
Classification: Main-belt Asteroid          SPK-ID: 2002549
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1745467335281838 3.2553e-08  
a 3.197980961115826 1.595e-08 au
q 2.639783830467737 1.0411e-07 au
i .06681718376242157 3.8223e-06 deg
node 193.957344734566 0.0027498 deg
peri 202.92489607 0.0027498 deg
M 237.9019336980043 1.0597e-05 deg
tp 2459708.965200738404
(2022-May-09.46520074)
6.4181e-05 TDB
period 2088.873968200237
5.72
1.5627e-05
4.278e-08
d
yr
n .1723416565481804 1.2893e-09 deg/d
Q 3.756178091763916 1.8734e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2137  
   data-arc span      23913 days (65.47 yr)  
   first obs. used      1954-12-22  
   last obs. used      2020-06-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47847  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:46:29  

Additional Information
 Earth MOID = 1.64702 au 
 Jupiter MOID = 1.67155 au 
 T_jup = 3.171 
[ 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 12.7   n/a MPO473799  
diameter diameter 17.039 km 0.087 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.051   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

2549 Baker (1976 UB)          Discovered 1976-Oct-23 by Harvard College at Agassiz Station
Discovered at Oak Ridge Observatory (until 1981 Harvard College's Agassiz Station). The principal observers are R. E. McCrosky, C.-Y. Shao, G. Schwartz, and J. H. Bulger, with some assistance from others.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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