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74948 (1999 TJ181)
Classification: Main-belt Asteroid          SPK-ID: 2074948
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1665087592693668 3.9996e-08  
a 2.376858798341404 1.0428e-08 au
q 1.981090988871098 9.4145e-08 au
i .7359330264788664 4.5003e-06 deg
node 237.5513665864774 0.00034936 deg
peri 187.6063088735027 0.00034966 deg
M 186.5613544041273 1.4301e-05 deg
tp 2459645.332433298605
(2022-Mar-06.83243330)
5.5059e-05 TDB
period 1338.454155877138
3.66
8.8079e-06
2.411e-08
d
yr
n .2689670007891146 1.77e-09 deg/d
Q 2.772626607811709 1.2164e-08 au
  Orbit Determination Parameters
   # obs. used (total)      555  
   data-arc span      8072 days (22.10 yr)  
   first obs. used      1997-01-31  
   last obs. used      2019-03-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51924  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 09:01:21  

Additional Information
 Earth MOID = .994644 au 
 Jupiter MOID = 2.52432 au 
 T_jup = 3.522 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.2   n/a MPO426456  
diameter diameter 1.994 km 0.174 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.093   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

74948 (1999 TJ181)          Discovered 1999-Oct-11 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 TJ181 = 1999 TK157 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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