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21991 Zane (1999 XM23)
Classification: Main-belt Asteroid          SPK-ID: 2021991
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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08829069887500363 5.1457e-08  
a 2.834875220572262 1.6108e-08 au
q 2.584582106124508 1.4419e-07 au
i 3.128038079018594 4.2295e-06 deg
node 113.1188546329545 9.0937e-05 deg
peri 240.9499724679197 9.4742e-05 deg
M 196.4830782343829 2.982e-05 deg
tp 2459992.380321409736
(2023-Feb-16.88032141)
0.00014624 TDB
period 1743.409260823356
4.77
1.4859e-05
4.068e-08
d
yr
n .2064919626674368 1.7599e-09 deg/d
Q 3.085168335020017 1.753e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1121  
   data-arc span      9220 days (25.24 yr)  
   first obs. used      1995-12-25  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55584  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 03:17:10  

Additional Information
 Earth MOID = 1.57934 au 
 Jupiter MOID = 2.29658 au 
 T_jup = 3.304 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.67   n/a E2021B10  
diameter diameter 3.985 km 0.995 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.193   0.051 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21991 Zane           Discovered 1999 Dec. 6 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Robert Teruo Zane (b. 1991) is a finalist in the 2005 Discovery Channel Young Scientist Challenge (DCYSC), a middle school science competition, for his botany & zoology project. He attends the Mid-Pacific Institute, Honolulu, Hawaii.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20051019/MPCPages.arcLast Updated: 2005-10-26

Alternate Designations
 1999 XM23 = 1995 YA25 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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