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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1394349562768319 7.711e-08  
a 2.575182592421499 1.5675e-08 au
q 2.216112120242349 1.9064e-07 au
i 6.375301226646809 7.1382e-06 deg
node 3.684051657104474 4.0373e-05 deg
peri 178.0425105389337 4.4875e-05 deg
M 183.7324823421457 2.443e-05 deg
tp 2459939.560951007964
(2022-Dec-26.06095101)
0.00010738 TDB
period 1509.421281346397
4.13
1.3781e-05
3.773e-08
d
yr
n .2385020036810939 2.1776e-09 deg/d
Q 2.93425306460065 1.786e-08 au
  Orbit Determination Parameters
   # obs. used (total)      519  
   data-arc span      8784 days (24.05 yr)  
   first obs. used      1996-12-08  
   last obs. used      2020-12-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .62167  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 17:07:37  

Additional Information
 Earth MOID = 1.21834 au 
 Jupiter MOID = 2.02437 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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1924-Nov-22 01:01 00:02 Amphi 0.0268632695957801 0.0268590733727052 0.0268674887603801 3.51176924681155 3.51176918587355 2424111.542183161 1.93476846326769 1384.46115168412 89.6576798904689 -82.118531124 44370.6209620476 T 19 CATAB v2.0f-lin.ifort 2021-Apr-13 17:07:38 2021-Apr-13 17:07

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