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118423 (1999 TJ84)
Classification: Main-belt Asteroid          SPK-ID: 2118423
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1258005928541084 4.5881e-08  
a 3.178623138860941 2.8695e-08 au
q 2.778750463532448 1.4577e-07 au
i 25.37840031205304 7.9367e-06 deg
node 208.6987565659378 9.6038e-06 deg
peri 302.4038664130783 3.157e-05 deg
M 156.0049074462191 3.0426e-05 deg
tp 2458303.499372081438
(2018-Jul-03.99937208)
0.00017564 TDB
period 2069.936333009302
5.67
2.803e-05
7.674e-08
d
yr
n .1739183926863234 2.3551e-09 deg/d
Q 3.578495814189435 3.2305e-08 au
  Orbit Determination Parameters
   # obs. used (total)      735  
   data-arc span      7671 days (21.00 yr)  
   first obs. used      1999-10-06  
   last obs. used      2020-10-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50568  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 18:11:40  

Additional Information
 Earth MOID = 1.85291 au 
 Jupiter MOID = 1.58632 au 
 T_jup = 3.038 
[ 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 14.27   n/a E2021B55  
diameter diameter 7.962 km 0.196 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 24.859 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Chang, C.-H.; Lin, H.-W.; Ip, W.-H.; Chen, W.-P.; et al. (2019) Ap. J. Supp. Ser. 241, A6.]
geometric albedo albedo 0.070   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

118423 (1999 TJ84)          Discovered 1999-Oct-13 by Spacewatch at Kitt Peak
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21

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Alternate Designations
 1999 TJ84 = 2002 JU25 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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