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JPL Small-Body Database Browser
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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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06678809338712652 3.8091e-08  
a 2.978261521161822 2.0841e-08 au
q 2.77934911255518 1.2296e-07 au
i 11.70852022552843 4.3557e-06 deg
node 71.90319730818375 2.7454e-05 deg
peri 12.52450430657234 5.3517e-05 deg
M 328.9445695668973 4.5409e-05 deg
tp 2459162.448796460270
(2020-Nov-08.94879646)
0.0002371 TDB
period 1877.338871579514
5.14
1.9706e-05
5.395e-08
d
yr
n .1917607979304829 2.0129e-09 deg/d
Q 3.177173929768463 2.2233e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1023  
   data-arc span      7407 days (20.28 yr)  
   first obs. used      1999-10-09  
   last obs. used      2020-01-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58524  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 22:36:18  

Additional Information
 Earth MOID = 1.79623 au 
 Jupiter MOID = 2.06661 au 
 T_jup = 3.225 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457134.5 (2015-Apr-22.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0635322061778138 3.7881e-08  
q 2.789445426362028 1.219e-07 au
tp 2457279.878047846442
(2015-Sep-14.37804785)
0.00024891 TDB
node 72.02451086272347 2.7526e-05 deg
peri 11.65618027282972 5.5881e-05 deg
i 11.69223663504947 4.3492e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1023  
   data-arc span      7407 days (20.28 yr)  
   first obs. used      1999-10-09  
   last obs. used      2020-01-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58524  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 22:36:18  

Additional Information
 Jupiter MOID = 2.06661 au 
 T_jup = 3.225 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.434939457620958E-15 -4.568018809459378E-15 -1.45240881192331E-12 1.63871606900145E-14 -2.797749628415524E-13 -2.35231161922235E-15
q -4.568018809459378E-15 1.485864343438755E-14 4.742495097608714E-12 -5.541059482383117E-14 9.123029121179931E-13 9.114568329208706E-15
tp -1.45240881192331E-12 4.742495097608714E-12 6.195500571889108E-8 -2.529506683783902E-11 1.215708810140174E-8 2.115907565346575E-11
node 1.63871606900145E-14 -5.541059482383117E-14 -2.529506683783902E-11 7.576762374661467E-10 -7.466332680404619E-10 -4.024554737439395E-11
peri -2.797749628415524E-13 9.123029121179931E-13 1.215708810140174E-8 -7.466332680404619E-10 3.122718392157928E-9 4.348046962047958E-11
i -2.35231161922235E-15 9.114568329208706E-15 2.115907565346575E-11 -4.024554737439395E-11 4.348046962047958E-11 1.891557379169441E-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 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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