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91722 (1999 TW157)
Classification: Main-belt Asteroid          SPK-ID: 2091722
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06678809327753842 3.8082e-08  
a 2.978261520703928 2.0816e-08 au
q 2.779349112454251 1.2292e-07 au
i 11.70852018203818 4.3554e-06 deg
node 71.90319732135464 2.7409e-05 deg
peri 12.52450330066594 5.3434e-05 deg
M 328.9445706838948 4.5325e-05 deg
tp 2459162.448790597969
(2020-Nov-08.94879060)
0.00023665 TDB
period 1877.338871146566
5.14
1.9682e-05
5.389e-08
d
yr
n .1917607979747064 2.0104e-09 deg/d
Q 3.177173928953606 2.2206e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1036  
   data-arc span      7605 days (20.82 yr)  
   first obs. used      1999-10-09  
   last obs. used      2020-08-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58223  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 08:19:20  

Additional Information
 Earth MOID = 1.79623 au 
 Jupiter MOID = 2.06661 au 
 T_jup = 3.225 
[ 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 14.1   n/a MPO366280  

91722 (1999 TW157)          Discovered 1999-Oct-09 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

Alternate Designations
 1999 TW157 = 2001 DD52 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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