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120670 (1996 XM21)
Classification: Main-belt Asteroid          SPK-ID: 2120670
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1390908496306444 7.7838e-08  
a 2.576106334370801 1.592e-08 au
q 2.217793515584282 1.9269e-07 au
i 6.373734476545626 7.33e-06 deg
node 3.68954375729132 5.0157e-05 deg
peri 178.1298919894041 5.4769e-05 deg
M 135.9378452175253 2.5432e-05 deg
tp 2458430.228082232077
(2018-Nov-07.72808223)		 0.00010347 TDB
period 1510.233519355395
4.13		 1.4e-05
3.833e-08		 d
yr
n .2383737318674114 2.2097e-09 deg/d
Q 2.934419153157321 1.8134e-08 au
   Orbit Determination Parameters
   # obs. used (total)      446  
   data-arc span      8633 days (23.64 yr)  
   first obs. used      1996-12-08  
   last obs. used      2020-07-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .64234  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 10:10:21  

Additional Information
 Earth MOID = 1.2205 au 
 Jupiter MOID = 2.0252 au 
 T_jup = 3.405 
[ 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 15.6   n/a MPO270617  
diameter diameter 1.920 km 0.450 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.302   0.222 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

120670 (1996 XM21)          Discovered 1996-Dec-08 by Spacewatch at Kitt Peak
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

[ show close-approach data ]
Alternate Designations
 1996 XM21 = 1998 FZ60 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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