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20647 (1999 TQ155)
Classification: Main-belt Asteroid          SPK-ID: 2020647
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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1067690367646982 3.4535e-08  
a 2.728485962331207 1.1232e-08 au
q 2.437168144307103 9.3387e-08 au
i 11.70078993689492 3.4974e-06 deg
node 198.4281438560609 1.6637e-05 deg
peri 27.37570904281084 2.2904e-05 deg
M 59.54980561038922 1.4438e-05 deg
tp 2458928.192965964778
(2020-Mar-19.69296596)
6.6393e-05 TDB
period 1646.193992538865
4.51
1.0165e-05
2.783e-08
d
yr
n .2186862554666386 1.3504e-09 deg/d
Q 3.019803780355311 1.2432e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2095  
   data-arc span      14228 days (38.95 yr)  
   first obs. used      1981-10-25  
   last obs. used      2020-10-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42658  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:26:04  

Additional Information
 Earth MOID = 1.4342 au 
 Jupiter MOID = 1.9585 au 
 T_jup = 3.317 
[ 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 13.72   n/a E2021B10  
diameter diameter 5.105 km 0.126 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 36.0044 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.224   0.049 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20647 (1999 TQ155)          Discovered 1999-Oct-07 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 TQ155 = 1981 UB25 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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