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70536 (1999 TW121)
Classification: Main-belt Asteroid          SPK-ID: 2070536
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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1140294267654745 2.1487e-07  
a 2.527496516700741 9.3153e-09 au
q 2.239287537749622 5.458e-07 au
i 5.412934177585186 4.3143e-06 deg
node 341.2912804947645 3.443e-05 deg
peri 193.7324226945995 4.14e-05 deg
M 307.5322069163133 3.9339e-05 deg
tp 2459414.406790664408
(2021-Jul-18.90679066)
0.00016082 TDB
period 1467.689798127414
4.02
8.1139e-06
2.221e-08
d
yr
n .2452834382710259 1.356e-09 deg/d
Q 2.81570549565186 1.0378e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1684  
   data-arc span      16094 days (44.06 yr)  
   first obs. used      1977-02-19  
   last obs. used      2021-03-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49817  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 12:50:20  

Additional Information
 Earth MOID = 1.24414 au 
 Jupiter MOID = 2.15385 au 
 T_jup = 3.437 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457407.5 (2016-Jan-20.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1137537037046848 2.1535e-07  
q 2.239687500150999 5.468e-07 au
tp 2457949.188040313160
(2017-Jul-14.68804031)
0.00016175 TDB
node 341.359862866164 3.4407e-05 deg
peri 194.1787186134235 4.1848e-05 deg
i 5.415603019079818 4.3155e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1684  
   data-arc span      16094 days (44.06 yr)  
   first obs. used      1977-02-19  
   last obs. used      2021-03-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49817  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 12:50:20  

Additional Information
 Jupiter MOID = 2.15385 au 
 T_jup = 3.437 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.63776821404533E-14 -1.177434335901968E-13 -3.23180697026432E-11 -7.422243139456001E-13 -4.103512937650421E-12 -3.801522597068629E-14
q -1.177434335901968E-13 2.989875498030736E-13 8.208204449704287E-11 1.884730730151414E-12 1.041976251677498E-11 9.665598827713888E-14
tp -3.23180697026432E-11 8.208204449704287E-11 2.616175774333885E-8 5.282436878833163E-10 3.754533441291685E-9 2.912221387406353E-11
node -7.422243139456001E-13 1.884730730151414E-12 5.282436878833163E-10 1.183873241310957E-9 -1.097954353762744E-9 -2.276582413838274E-11
peri -4.103512937650421E-12 1.041976251677498E-11 3.754533441291685E-9 -1.097954353762744E-9 1.751227701450854E-9 2.729886870366708E-11
i -3.801522597068629E-14 9.665598827713888E-14 2.912221387406353E-11 -2.276582413838274E-11 2.729886870366708E-11 1.862391514859055E-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 14.58   n/a E2021B10  
diameter diameter 4.068 km 0.483 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.185   0.019 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

70536 (1999 TW121)          Discovered 1999-Oct-04 by LINEAR at Socorro
Reference: 20031109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 TW121 = 1977 DR5 = 1993 DY2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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