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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1255792011473113 4.719e-08  
a 3.178843544885637 2.8991e-08 au
q 2.779646911946612 1.4983e-07 au
i 25.37857032646218 8.0987e-06 deg
node 208.8075889468395 1.0257e-05 deg
peri 302.2417528552792 3.2585e-05 deg
M 121.316535081199 3.1334e-05 deg
tp 2458302.878825058867
(2018-Jul-03.37882506)
0.00018035 TDB
period 2070.151631108764
5.67
2.832e-05
7.754e-08
d
yr
n .1739003049777496 2.379e-09 deg/d
Q 3.578040177824663 3.2632e-08 au
  Orbit Determination Parameters
   # obs. used (total)      602  
   data-arc span      7157 days (19.59 yr)  
   first obs. used      1999-10-06  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54332  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 06:55:42  

Additional Information
 Earth MOID = 1.85454 au 
 Jupiter MOID = 1.58855 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 14.2   n/a MPO436569  
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. 2019-August); 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) ArXiv:1901.08719.]
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

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