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16832 (1997 WR21)
Classification: Main-belt Asteroid          SPK-ID: 2016832
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1661604086324528 3.8144e-08  
a 2.265442443422921 7.0837e-09 au
q 1.889015601290466 8.822e-08 au
i 4.628680425407626 3.2712e-06 deg
node 276.0737627894149 5.6129e-05 deg
peri 112.8064160394704 5.7429e-05 deg
M 12.82665957592998 1.2488e-05 deg
tp 2459352.124930739911
(2021-May-17.62493074)
4.3109e-05 TDB
period 1245.45481534493
3.41
5.8416e-06
1.599e-08
d
yr
n .2890510322530631 1.3557e-09 deg/d
Q 2.641869285555376 8.2608e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1484  
   data-arc span      10039 days (27.49 yr)  
   first obs. used      1993-06-12  
   last obs. used      2020-12-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50269  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:43:36  

Additional Information
 Earth MOID = .899318 au 
 Jupiter MOID = 2.81213 au 
 T_jup = 3.594 
[ 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 15.07   n/a E2021B10  
diameter diameter 3.441 km 0.242 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.17324 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:
[Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.179   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

16832 (1997 WR21)          Discovered 1997-Nov-30 by Kobayashi, T. at Oizumi
Reference: 20000913/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1997 WR21 = 1993 PX3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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