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16971 (1998 WJ3)
Classification: Main-belt Asteroid          SPK-ID: 2016971
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 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .111793500581241 1.3733e-08  
a 2.69317681457337 1.0955e-08 au
q 2.392097150787977 4.1495e-08 au
i 14.00630214043841 7.7722e-07 deg
node 92.46976979373686 4.6408e-06 deg
peri 71.14479494039568 1.1634e-05 deg
M 294.3006664223948 1.3749e-05 deg
tp 2459495.114549695392
(2021-Oct-07.61454970)
6.2421e-05 TDB
period 1614.342674649197
4.42
9.8501e-06
2.697e-08
d
yr
n .2230009809275651 1.3607e-09 deg/d
Q 2.994256478358762 1.218e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2245  
   data-arc span      17036 days (46.64 yr)  
   first obs. used      1974-07-23  
   last obs. used      2021-03-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42216  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:49:30  

Additional Information
 Earth MOID = 1.44366 au 
 Jupiter MOID = 2.14861 au 
 T_jup = 3.319 
[ 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 12.8   n/a MPO350937  
diameter diameter 7.715 km 0.178 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 43.1120 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.247   0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

16971 (1998 WJ3)          Discovered 1998-Nov-19 by Kobayashi, T. at Oizumi
Reference: 20000913/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 WJ3 = 1977 AH1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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