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442346 (2011 SW208)
Classification: Main-belt Asteroid          SPK-ID: 2442346
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ hide orbit diagram ]

For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2378418495729109 1.1892e-07  
a 2.620996443454877 4.5663e-08 au
q 1.997613801619547 3.2846e-07 au
i 3.314988380055653 1.3095e-05 deg
node 122.0702373245732 0.00014665 deg
peri 241.2371803324096 0.00015142 deg
M 25.33954082680278 3.4935e-05 deg
tp 2458891.407645668633
(2020-Feb-11.90764567)
0.00014843 TDB
period 1549.880000893736
4.24
4.0503e-05
1.109e-07
d
yr
n .2322760470439044 6.0701e-09 deg/d
Q 3.244379085290206 5.6524e-08 au
  Orbit Determination Parameters
   # obs. used (total)      78  
   data-arc span      4747 days (13.00 yr)  
   first obs. used      2007-11-18  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46798  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:27:23  

Additional Information
 Earth MOID = .997746 au 
 Jupiter MOID = 2.21585 au 
 T_jup = 3.362 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457272.5 (2015-Sep-07.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2407296219295949 1.187e-07  
q 1.989228153509016 3.2856e-07 au
tp 2457340.977289240107
(2015-Nov-14.47728924)
0.00011924 TDB
node 122.2027861406992 0.00014698 deg
peri 241.0060500935553 0.00015152 deg
i 3.313806407623359 1.3094e-05 deg
  Orbit Determination Parameters
   # obs. used (total)      78  
   data-arc span      4747 days (13.00 yr)  
   first obs. used      2007-11-18  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46798  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:27:23  

Additional Information
 Jupiter MOID = 2.21585 au 
 T_jup = 3.362 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.408991566506824E-14 -3.882458137467442E-14 -9.98254370198193E-12 2.128509168416614E-13 -3.134917121860075E-12 -1.307062604330164E-14
q -3.882458137467442E-14 1.079515644239042E-13 2.827767644653422E-11 -5.958387007851532E-13 8.81975362911726E-12 3.746612542684788E-14
tp -9.98254370198193E-12 2.827767644653422E-11 1.421777366037302E-8 -2.31074446503289E-10 4.435460126249722E-9 5.019313435109144E-12
node 2.128509168416614E-13 -5.958387007851532E-13 -2.31074446503289E-10 2.160206171678637E-8 -2.163332327427405E-8 6.829408066537814E-10
peri -3.134917121860075E-12 8.81975362911726E-12 4.435460126249722E-9 -2.163332327427405E-8 2.295790632488138E-8 -6.803897441447275E-10
i -1.307062604330164E-14 3.746612542684788E-14 5.019313435109144E-12 6.829408066537814E-10 -6.803897441447275E-10 1.714583248085445E-10

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.8   n/a MPO402745  

442346 (2011 SW208)          Discovered 2007-Nov-18 by Mt. Lemmon Survey at Mount Lemmon
Reference: Last Updated: 2015-09-02

Alternate Designations
 2011 SW208 = 2007 XO30 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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