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20137 (1996 PX8)
Classification: Mars-crossing Asteroid          SPK-ID: 2020137
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3028158619634802 4.4411e-08  
a 2.29075456727595 6.3928e-09 au
q 1.597077748439504 1.0135e-07 au
i 5.868295248008786 4.1092e-06 deg
node 150.5616385265982 4.0523e-05 deg
peri 253.6018559675168 4.12e-05 deg
M 320.0735930260162 5.5283e-06 deg
tp 2459340.950728786202
(2021-May-06.45072879)
1.9534e-05 TDB
period 1266.386489422386
3.47
5.3012e-06
1.451e-08
d
yr
n .2842734054784494 1.19e-09 deg/d
Q 2.984431386112395 8.3286e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1385  
   data-arc span      9829 days (26.91 yr)  
   first obs. used      1994-01-17  
   last obs. used      2020-12-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4954  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:14:01  

Additional Information
 Earth MOID = .617304 au 
 Jupiter MOID = 2.45066 au 
 T_jup = 3.530 
[ 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 15.34   n/a E2021B10  
rotation period rot_per 11.16 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Chang, C.-K.; Lin, H.-W.; Ip, W.-H.; Prince, T.A.; et al. (2016) Astrophys. J. Sup. Ser. 227, A20.]

20137 (1996 PX8)          Discovered 1996-Aug-08 by Elst, E. W. at La Silla
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1996 PX8 = 1994 BA5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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