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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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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1570044312669724 3.4625e-08  
a 2.58611860013234 1.1643e-08 au
q 2.180086520129623 9.1797e-08 au
i 4.377401412984677 4.6784e-06 deg
node 127.2580258319445 4.8049e-05 deg
peri 98.60896799550139 5.1213e-05 deg
M 26.95784826607634 2.0397e-05 deg
tp 2458886.749370840586
(2020-Feb-07.24937084)
8.5598e-05 TDB
period 1519.046553464017
4.16
1.0258e-05
2.808e-08
d
yr
n .2369907618558892 1.6004e-09 deg/d
Q 2.992150680135057 1.3471e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1171  
   data-arc span      7736 days (21.18 yr)  
   first obs. used      1999-04-14  
   last obs. used      2020-06-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5552  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 22:22:59  

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

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