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193914 (2001 QA261)
Classification: Main-belt Asteroid          SPK-ID: 2193914
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1410057218254023 6.026e-08  
a 2.251060385077198 9.3241e-09 au
q 1.93364799060682 1.3501e-07 au
i 6.138909600207189 5.1202e-06 deg
node 308.7693687923825 5.2954e-05 deg
peri 42.63788025956903 5.518e-05 deg
M 199.6943474494207 1.7339e-05 deg
tp 2459549.820087027591
(2021-Dec-01.32008703)
6.1273e-05 TDB
period 1233.613588688256
3.38
7.6646e-06
2.098e-08
d
yr
n .2918255791773504 1.8132e-09 deg/d
Q 2.568472779547577 1.0639e-08 au
  Orbit Determination Parameters
   # obs. used (total)      366  
   data-arc span      7290 days (19.96 yr)  
   first obs. used      2000-04-27  
   last obs. used      2020-04-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60763  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 06:24:40  

Additional Information
 Earth MOID = .932239 au 
 Jupiter MOID = 2.84177 au 
 T_jup = 3.606 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457426.5 (2016-Feb-08.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1410501363907023 6.037e-08  
q 1.933574490377343 1.3526e-07 au
tp 2457080.471795211273
(2015-Feb-26.97179521)
5.3947e-05 TDB
node 308.8656109729902 5.2887e-05 deg
peri 42.14255738852373 5.5109e-05 deg
i 6.142962366166263 5.125e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      366  
   data-arc span      7290 days (19.96 yr)  
   first obs. used      2000-04-27  
   last obs. used      2020-04-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60763  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 06:24:40  

Additional Information
 Jupiter MOID = 2.84177 au 
 T_jup = 3.606 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.644553418879232E-15 -8.151267685359086E-15 7.720590957902293E-13 1.376997751656979E-14 1.488512281435671E-13 -4.675090077652836E-15
q -8.151267685359086E-15 1.82943737983361E-14 -1.578803384079289E-12 -3.068504945738881E-14 -2.900515763132552E-13 1.055119981998716E-14
tp 7.720590957902293E-13 -1.578803384079289E-12 2.910315348207743E-9 -1.413035340477719E-11 8.680373975736364E-10 -3.613971573155105E-12
node 1.376997751656979E-14 -3.068504945738881E-14 -1.413035340477719E-11 2.797050551225952E-9 -2.784813684756915E-9 1.143929566084609E-10
peri 1.488512281435671E-13 -2.900515763132552E-13 8.680373975736364E-10 -2.784813684756915E-9 3.036964431041034E-9 -1.147029337519396E-10
i -4.675090077652836E-15 1.055119981998716E-14 -3.613971573155105E-12 1.143929566084609E-10 -1.147029337519396E-10 2.626548511075934E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.6   n/a MPO449957  

193914 (2001 QA261)          Discovered 2001-Aug-25 by LINEAR at Socorro
Reference: 20081113/Numbers.arcLast Updated: 2008-11-17
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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