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60148 Seanurban (1999 US1)
Classification: Main-belt Asteroid          SPK-ID: 2060148
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05236422120702781 6.423e-08  
a 2.943056358274019 2.0966e-08 au
q 2.788945504104609 1.9286e-07 au
i .9596161979264678 6.2532e-06 deg
node 337.2306884051166 0.00027675 deg
peri 225.4405490812735 0.00028001 deg
M 284.0811416545714 4.5461e-05 deg
tp 2459785.404942767596
(2022-Jul-24.90494277)
0.00023456 TDB
period 1844.150221007174
5.05
1.9706e-05
5.395e-08
d
yr
n .1952118628402124 2.086e-09 deg/d
Q 3.09716721244343 2.2063e-08 au
  Orbit Determination Parameters
   # obs. used (total)      579  
   data-arc span      9600 days (26.28 yr)  
   first obs. used      1994-10-31  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57569  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 11:43:00  

Additional Information
 Earth MOID = 1.78595 au 
 Jupiter MOID = 1.86147 au 
 T_jup = 3.270 
[ 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 15.38   n/a MPCxxxxx  

60148 Seanurban           Discovered 1999 Oct. 16 by P. Kusnirak and P. Pravec at Ondrejov.
Sean E. Urban (b. 1962) has made significant advances to astrometry, including completion of the reductions of the {22 \, 000} Astrographic Catalogue plates. These data formed the basis of proper motions for the most important reference star catalogs of the late 20th and early 21st centuries, including Tycho-2 and the UCAC.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2018-05-29Last Updated: 2018-05-31

[ show close-approach data ]
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