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JPL Small-Body Database Browser
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4257 Ubasti (1987 QA)
Classification: Apollo [NEO]          SPK-ID: 2004257
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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 151 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4684628208898037 4.9442e-08  
a 1.647020542333495 7.4422e-09 au
q .8754526530084916 8.1158e-08 au
i 40.71356622111451 1.0223e-05 deg
node 169.1908877157306 1.018e-05 deg
peri 278.9320413777637 1.2903e-05 deg
M 308.4391628111252 1.7837e-05 deg
tp 2458711.076899970612
(2019-Aug-15.57689997)
3.8903e-05 TDB
period 772.0527082133864
2.11
5.2329e-06
1.433e-08
d
yr
n .4662894076663224 3.1605e-09 deg/d
Q 2.418588431658498 1.0929e-08 au
  Orbit Determination Parameters
   # obs. used (total)      706  
   data-arc span      11282 days (30.89 yr)  
   first obs. used      1987-08-23  
   last obs. used      2018-07-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46768  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Jul-14 06:52:43  

Additional Information
 Earth MOID = .169849 au 
 Jupiter MOID = 3.36656 au 
 T_jup = 3.913 
[ 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 15.9   n/a MPO452225  

4257 Ubasti (1987 QA)          Discovered 1987-Aug-23 by Mueller, J. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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