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21120 (1992 WP)
Classification: Main-belt Asteroid          SPK-ID: 2021120
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1743513171663178 3.1452e-08  
a 2.560110631111201 1.0868e-08 au
q 2.113751970485469 8.1022e-08 au
i 13.33382415784895 3.7184e-06 deg
node 56.7582360972383 1.8005e-05 deg
peri 336.7027930117581 2.2571e-05 deg
M 9.70002278999525 1.5967e-05 deg
tp 2459356.185917490529
(2021-May-21.68591749)
6.623e-05 TDB
period 1496.189237656083
4.10
9.5275e-06
2.608e-08
d
yr
n .2406112749240014 1.5322e-09 deg/d
Q 3.006469291736932 1.2763e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1414  
   data-arc span      10243 days (28.04 yr)  
   first obs. used      1992-10-25  
   last obs. used      2020-11-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47823  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:39:59  

Additional Information
 Earth MOID = 1.12711 au 
 Jupiter MOID = 2.42597 au 
 T_jup = 3.377 
[ 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 14.35   n/a E2021B10  
diameter diameter 3.822 km 0.401 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.277   0.114 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21120 (1992 WP)          Discovered 1992-Nov-16 by Endate, K., Watanabe, K. at Kitami
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1992 WP = 1999 LZ22 = 2000 PV7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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