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117944 (6257 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2117944
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2186625555278532 4.4127e-08  
a 2.563259389150248 1.0804e-08 au
q 2.002770540637891 1.0877e-07 au
i 2.62148659442575 5.6689e-06 deg
node 324.2211524041715 8.2333e-05 deg
peri 95.09344442417458 8.3778e-05 deg
M 157.6606141323675 1.5773e-05 deg
tp 2458344.040443034374
(2018-Aug-13.54044303)
6.3431e-05 TDB
period 1498.950399300189
4.10
9.4766e-06
2.595e-08
d
yr
n .2401680537048273 1.5184e-09 deg/d
Q 3.123748237662606 1.3166e-08 au
  Orbit Determination Parameters
   # obs. used (total)      561  
   data-arc span      21766 days (59.59 yr)  
   first obs. used      1960-09-24  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57339  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 20:15:45  

Additional Information
 Earth MOID = 1.0173 au 
 Jupiter MOID = 2.23165 au 
 T_jup = 3.398 
[ 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 16.5   n/a MPO417614  
rotation period rot_per 10.67 h n/a LCDB (Rev. 2019-August); 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.]

117944 (6257 P-L)          Discovered 1960-Sep-24 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

Alternate Designations
 6257 P-L = 1993 TO8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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