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442369 (2011 SB257)
Classification: Main-belt Asteroid          SPK-ID: 2442369
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 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1593743095107369 8.8101e-08  
a 2.809550147969679 7.2524e-08 au
q 2.361780033101223 2.7045e-07 au
i 4.32503421814549 1.2223e-05 deg
node 315.9737248574756 0.00012069 deg
peri 103.2671443598921 0.00012883 deg
M 272.0940136698292 5.0795e-05 deg
tp 2459420.519602619464
(2021-Jul-25.01960262)
0.00025332 TDB
period 1720.099657093664
4.71
6.6602e-05
1.823e-07
d
yr
n .2092901992715164 8.1037e-09 deg/d
Q 3.257320262838136 8.4082e-08 au
  Orbit Determination Parameters
   # obs. used (total)      61  
   data-arc span      3263 days (8.93 yr)  
   first obs. used      2007-12-31  
   last obs. used      2016-12-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5908  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-09 12:29:19  

Additional Information
 Earth MOID = 1.37889 au 
 Jupiter MOID = 2.0894 au 
 T_jup = 3.299 
[ 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 17.6   n/a MPO397580  

442369 (2011 SB257)          Discovered 2007-Dec-31 by Spacewatch at Kitt Peak
Reference: Last Updated: 2015-09-02
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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