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74987 (1999 TZ253)
Classification: Main-belt Asteroid          SPK-ID: 2074987
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .163605288598201 5.3554e-08  
a 2.395604620334221 1.3718e-08 au
q 2.003671035057257 1.3349e-07 au
i 10.74798731075825 5.5846e-06 deg
node 278.7243362997704 2.4867e-05 deg
peri 354.650006773202 3.0168e-05 deg
M 287.7532828529918 2.0228e-05 deg
tp 2459272.292054734649
(2021-Feb-26.79205473)
7.7202e-05 TDB
period 1354.319525763053
3.71
1.1633e-05
3.185e-08
d
yr
n .2658161483695424 2.2833e-09 deg/d
Q 2.787538205611185 1.5963e-08 au
  Orbit Determination Parameters
   # obs. used (total)      736  
   data-arc span      7538 days (20.64 yr)  
   first obs. used      1999-09-08  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5407  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 14:09:52  

Additional Information
 Earth MOID = .987569 au 
 Jupiter MOID = 2.33839 au 
 T_jup = 3.487 
[ 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 15.3   n/a MPO366108  
diameter diameter 3.702 km 0.038 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.074   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

74987 (1999 TZ253)          Discovered 1999-Oct-11 by LONEOS at Anderson Mesa
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 TZ253 = 2000 YG58 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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