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91638 (1999 TQ82)
Classification: Main-belt Asteroid          SPK-ID: 2091638
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 .2101434914117581 5.0006e-08  
a 3.073738157202945 1.7683e-08 au
q 2.427812089162774 1.6033e-07 au
i 6.389387263080006 4.8444e-06 deg
node 25.77341245576145 4.1873e-05 deg
peri 320.3327935026675 4.3276e-05 deg
M 321.3051479279302 1.0423e-05 deg
tp 2459212.067726666557
(2020-Dec-28.56772667)
5.7643e-05 TDB
period 1968.333706460568
5.39
1.6985e-05
4.65e-08
d
yr
n .1828958163030939 1.5783e-09 deg/d
Q 3.719664225243115 2.1399e-08 au
  Orbit Determination Parameters
   # obs. used (total)      622  
   data-arc span      7631 days (20.89 yr)  
   first obs. used      1999-09-09  
   last obs. used      2020-07-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56111  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 08:18:36  

Additional Information
 Earth MOID = 1.4254 au 
 Jupiter MOID = 1.72538 au 
 T_jup = 3.186 
[ 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 14.8   n/a MPO474794  
diameter diameter 4.978 km 0.770 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 7.146 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.]
geometric albedo albedo 0.086   0.021 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

91638 (1999 TQ82)          Discovered 1999-Oct-12 by Spacewatch at Kitt Peak
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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