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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1663502041089394 3.8141e-08  
a 2.266014971363187 7.1873e-09 au
q 1.889062918363008 8.8254e-08 au
i 4.628801405749432 3.2713e-06 deg
node 276.0794434301021 5.6121e-05 deg
peri 112.75514385422 5.7417e-05 deg
M 316.2234747284605 1.2345e-05 deg
tp 2459352.006538268333
(2021-May-17.50653827)
4.3047e-05 TDB
period 1245.926976576635
3.41
5.9277e-06
1.623e-08
d
yr
n .2889414923731342 1.3747e-09 deg/d
Q 2.642967024363365 8.3829e-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 = .898869 au 
 Jupiter MOID = 2.81025 au 
 T_jup = 3.593 
[ 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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