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109558 (2001 QT261)
Classification: Main-belt Asteroid          SPK-ID: 2109558
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03837662424583181 5.4029e-08  
a 2.765434462392001 1.8565e-08 au
q 2.659306423152309 1.4894e-07 au
i 5.893547098914381 5.1008e-06 deg
node 277.2247879168269 5.1368e-05 deg
peri 238.8222289195727 8.1691e-05 deg
M 236.4562295455497 6.5045e-05 deg
tp 2459576.950252285562
(2021-Dec-28.45025229)
0.00030409 TDB
period 1679.745486635558
4.60
1.6915e-05
4.631e-08
d
yr
n .2143181826438844 2.1582e-09 deg/d
Q 2.871562501631693 1.9278e-08 au
  Orbit Determination Parameters
   # obs. used (total)      702  
   data-arc span      6916 days (18.93 yr)  
   first obs. used      2001-08-25  
   last obs. used      2020-08-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54645  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 09:34:24  

Additional Information
 Earth MOID = 1.6752 au 
 Jupiter MOID = 2.15005 au 
 T_jup = 3.331 
[ 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 15.1   n/a MPO449653  
diameter diameter 6.062 km 0.149 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.058   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

109558 (2001 QT261)          Discovered 2001-Aug-25 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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