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150309 (1999 US2)
Classification: Main-belt Asteroid          SPK-ID: 2150309
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1423318195652316 5.3247e-08  
a 2.182587022385875 8.1181e-09 au
q 1.871935440130232 1.1672e-07 au
i 3.186537586037669 4.3691e-06 deg
node 286.4289457661587 0.00010447 deg
peri 32.75635334773832 0.00010585 deg
M 262.888066300393 1.7464e-05 deg
tp 2459518.206339542567
(2021-Oct-30.70633954)
5.7717e-05 TDB
period 1177.75723207319
3.22
6.571e-06
1.799e-08
d
yr
n .3056657095336167 1.7054e-09 deg/d
Q 2.493238604641518 9.2736e-09 au
  Orbit Determination Parameters
   # obs. used (total)      342  
   data-arc span      7441 days (20.37 yr)  
   first obs. used      1999-10-12  
   last obs. used      2020-02-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60316  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 13:53:09  

Additional Information
 Earth MOID = .857682 au 
 Jupiter MOID = 2.77313 au 
 T_jup = 3.664 
[ 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 17.51   n/a E2021B55  

150309 (1999 US2)          Discovered 1999-Oct-19 by Pravec, P., Kusnirak, P. at Ondrejov
Reference: 20070303/Numbers.arcLast Updated: 2007-03-07

[ show close-approach data ]
Alternate Designations
 1999 US2 = 2002 RD32 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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