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155400 (1995 UD1)
Classification: Main-belt Asteroid          SPK-ID: 2155400
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .142965060262568 6.4624e-08  
a 2.244462595515007 9.9886e-09 au
q 1.923582865290124 1.4331e-07 au
i 8.505153994709792 6.7627e-06 deg
node 5.630480236902258 3.2368e-05 deg
peri 13.13503382926164 4.0379e-05 deg
M 178.7169650733842 2.362e-05 deg
tp 2458590.780246853390
(2019-Apr-17.28024685)		 7.8966e-05 TDB
period 1228.194038784452
3.36		 8.1988e-06
2.245e-08		 d
yr
n .2931132936911934 1.9567e-09 deg/d
Q 2.56534232573989 1.1417e-08 au
   Orbit Determination Parameters
   # obs. used (total)      284  
   data-arc span      8884 days (24.32 yr)  
   first obs. used      1995-10-21  
   last obs. used      2020-02-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56946  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 13:10:32  

Additional Information
 Earth MOID = .92461 au 
 Jupiter MOID = 2.90475 au 
 T_jup = 3.604 
[ show covariance matrix ]

[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.30   n/a E2021B55  

155400 (1995 UD1)          Discovered 1995-Oct-21 by Klet at Klet
Reference: 20070502/Numbers.arcLast Updated: 2007-05-02
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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