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56238 (1999 JA46)
Classification: Main-belt Asteroid          SPK-ID: 2056238
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 .1570044537537758 3.817e-08  
a 2.586118588867393 1.4127e-08 au
q 2.180086452479783 1.037e-07 au
i 4.377400913716868 4.8418e-06 deg
node 127.2580244840387 4.8629e-05 deg
peri 98.60895221866971 5.3164e-05 deg
M 26.95787130359294 2.6073e-05 deg
tp 2458886.749274375320
(2020-Feb-07.24927438)
0.00010932 TDB
period 1519.04654353873
4.16
1.2447e-05
3.408e-08
d
yr
n .2369907634043613 1.9419e-09 deg/d
Q 2.992150725255004 1.6345e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1118  
   data-arc span      7571 days (20.73 yr)  
   first obs. used      1999-04-14  
   last obs. used      2020-01-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56345  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 09:16:42  

Additional Information
 Earth MOID = 1.17593 au 
 Jupiter MOID = 2.00048 au 
 T_jup = 3.400 
[ 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 14.9   n/a MPO337704  
rotation period rot_per 4.25 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Chang, C.-K.; Lin, H.-W.; Ip, W.-H.; Prince, T.A.; et al. (2016) Astrophys. J. Sup. Ser. 227, A20.]

56238 (1999 JA46)          Discovered 1999-May-10 by LINEAR at Socorro
Reference: 20030318/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1999 JA46 = 2000 RY68 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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