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442285 (2011 SD1)
Classification: Main-belt Asteroid          SPK-ID: 2442285
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 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1558486923106766 5.9686e-08  
a 2.617753660836236 3.5136e-08 au
q 2.209780176003423 1.4785e-07 au
i 13.00034311890687 8.728e-06 deg
node 346.3944687299996 2.8007e-05 deg
peri 81.30771214912453 5.1197e-05 deg
M 320.9559942173179 3.963e-05 deg
tp 2459168.281262476868
(2020-Nov-14.78126248)
0.0001712 TDB
period 1547.004547327037
4.24
3.1147e-05
8.528e-08
d
yr
n .2327077839700079 4.6852e-09 deg/d
Q 3.02572714566905 4.0612e-08 au
  Orbit Determination Parameters
   # obs. used (total)      143  
   data-arc span      4279 days (11.72 yr)  
   first obs. used      2007-10-14  
   last obs. used      2019-07-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58373  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 07:42:57  

Additional Information
 Earth MOID = 1.26646 au 
 Jupiter MOID = 2.36487 au 
 T_jup = 3.353 
[ 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 17.2   n/a MPO495191  

442285 (2011 SD1)          Discovered 2009-Feb-19 by Spacewatch at Kitt Peak
Reference: Last Updated: 2015-09-02

Alternate Designations
 2011 SD1 = 2009 DC121 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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