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16827 (1997 WD2)
Classification: Main-belt Asteroid          SPK-ID: 2016827
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2743419532702863 8.1532e-09  
a 2.339330720386974 7.0674e-09 au
q 1.697554161210826 1.7939e-08 au
i 6.241815163934093 1.085e-06 deg
node 86.83879346121196 5.6716e-06 deg
peri 260.0759282146166 7.3465e-06 deg
M 210.8417141039648 4.8686e-06 deg
tp 2459741.977912652555
(2022-Jun-11.47791265)
1.9365e-05 TDB
period 1306.880455107867
3.58
5.9223e-06
1.621e-08
d
yr
n .2754651342385301 1.2483e-09 deg/d
Q 2.981107279563123 9.0062e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1997  
   data-arc span      10113 days (27.69 yr)  
   first obs. used      1993-07-15  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49841  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:23:50  

Additional Information
 Earth MOID = .702766 au 
 Jupiter MOID = 2.46738 au 
 T_jup = 3.506 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456841.5 (2014-Jul-03.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2755462253923007 8.2025e-09  
q 1.694334417573339 1.807e-08 au
tp 2457126.703293763512
(2015-Apr-14.20329376)
1.3344e-05 TDB
node 86.9613105677966 5.6747e-06 deg
peri 259.7699375345345 7.3244e-06 deg
i 6.240278738806891 1.0845e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1997  
   data-arc span      10113 days (27.69 yr)  
   first obs. used      1993-07-15  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49841  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:23:50  

Additional Information
 Jupiter MOID = 2.46738 au 
 T_jup = 3.506 
Orbit Covariance (6×6)
  e q tp node peri i
e 6.72804004072096E-17 -1.429618550438627E-16 2.674336264435277E-14 -6.771884125538086E-15 1.004177952210534E-14 4.33979442296382E-16
q -1.429618550438627E-16 3.265183430450063E-16 -5.128864177026073E-14 1.517335881288237E-14 -1.989946076122406E-14 -1.398583369939074E-15
tp 2.674336264435277E-14 -5.128864177026073E-14 1.780523124228317E-10 -1.19101552635628E-11 6.274434862653477E-11 -5.635507167468679E-12
node -6.771884125538086E-15 1.517335881288237E-14 -1.19101552635628E-11 3.220170396747416E-11 -3.524041624160789E-11 -2.053550576751081E-12
peri 1.004177952210534E-14 -1.989946076122406E-14 6.274434862653477E-11 -3.524041624160789E-11 5.364627093828154E-11 5.757138000054369E-13
i 4.33979442296382E-16 -1.398583369939074E-15 -5.635507167468679E-12 -2.053550576751081E-12 5.757138000054369E-13 1.176144979236334E-12

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.98   n/a E2021B10  
diameter diameter 4.899 km 0.084 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.203   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

16827 (1997 WD2)          Discovered 1997-Nov-23 by Kobayashi, T. at Oizumi
Reference: 20000913/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1997 WD2 = 1993 NC = 1995 BS16 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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