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21596 (1998 WG7)
Classification: Main-belt Asteroid          SPK-ID: 2021596
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 .2305502734771179 2.3048e-08  
a 2.37992419150321 5.7834e-09 au
q 1.831232018297336 5.5782e-08 au
i 6.08854505161876 3.0496e-06 deg
node 96.97736100308597 3.1393e-05 deg
peri 217.0233294660715 3.2449e-05 deg
M 95.0973521670044 9.5297e-06 deg
tp 2458846.250670996713
(2019-Dec-28.75067100)
3.4785e-05 TDB
period 1341.044261855189
3.67
4.8882e-06
1.338e-08
d
yr
n .2684475152982491 9.7851e-10 deg/d
Q 2.928616364709083 7.1167e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2147  
   data-arc span      12665 days (34.67 yr)  
   first obs. used      1986-06-10  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49016  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:49:42  

Additional Information
 Earth MOID = .819448 au 
 Jupiter MOID = 2.36582 au 
 T_jup = 3.495 
[ 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 14.4   n/a MPO492977  
diameter diameter 7.330 km 0.088 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.052   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21596 (1998 WG7)          Discovered 1998-Nov-23 by Urata, T. at Oohira
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 WG7 = 1986 LR = 1993 FU55 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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