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16720 (1995 WT)
Classification: Main-belt Asteroid          SPK-ID: 2016720
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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2322762823737276 1.9361e-08  
a 3.119009117915021 1.3321e-08 au
q 2.394537275315961 6.3041e-08 au
i 7.38958472827214 1.5196e-06 deg
node 256.2275485444914 1.8455e-06 deg
peri 162.7865040918193 3.6835e-06 deg
M 205.0658287192646 5.9922e-06 deg
tp 2460066.400730716606
(2023-May-01.90073072)
3.7097e-05 TDB
period 2011.978768022352
5.51
1.2889e-05
3.529e-08
d
yr
n .1789283295240025 1.1462e-09 deg/d
Q 3.843480960514082 1.6415e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2026  
   data-arc span      25568 days (70.00 yr)  
   first obs. used      1950-08-22  
   last obs. used      2020-08-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48183  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:40:00  

Additional Information
 Earth MOID = 1.40771 au 
 Jupiter MOID = 1.51698 au 
 T_jup = 3.162 
[ 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 12.77   n/a E2021B10  
diameter diameter 9.146 km 0.227 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 24.687 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 0.211   0.025 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

16720 (1995 WT)          Discovered 1995-Nov-17 by Kobayashi, T. at Oizumi
Reference: 20000913/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1995 WT = 1950 QA = 1984 YJ1 = 1987 KM1 = 1991 BU 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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