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42999 (1999 UQ2)
Classification: Main-belt Asteroid          SPK-ID: 2042999
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1928255864396339 3.818e-08  
a 3.016762026700339 1.9012e-08 au
q 2.435053119753028 1.1835e-07 au
i 4.780133609375706 4.683e-06 deg
node 152.3332044087927 4.3166e-05 deg
peri 340.0929810459384 4.4565e-05 deg
M 241.2511437350119 1.1833e-05 deg
tp 2459631.801673603780
(2022-Feb-21.30167360)
6.578e-05 TDB
period 1913.859296381018
5.24
1.8092e-05
4.953e-08
d
yr
n .1881016021819035 1.7781e-09 deg/d
Q 3.59847093364765 2.2678e-08 au
  Orbit Determination Parameters
   # obs. used (total)      958  
   data-arc span      8982 days (24.59 yr)  
   first obs. used      1996-03-22  
   last obs. used      2020-10-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54633  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 00:04:20  

Additional Information
 Earth MOID = 1.45008 au 
 Jupiter MOID = 1.45665 au 
 T_jup = 3.214 
[ 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 14.6   n/a MPO452761  

42999 (1999 UQ2)          Discovered 1999-Oct-18 by Pravec, P. at Ondrejov
Reference: 20020624/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 UQ2 = 2001 BA71 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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