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12955 (2162 T-2)
Classification: Main-belt Asteroid          SPK-ID: 2012955
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08098092443401245 3.2044e-08  
a 2.626249915097092 1.0906e-08 au
q 2.413573769177783 8.2819e-08 au
i 4.446446740769495 4.144e-06 deg
node 192.8324887932491 4.4092e-05 deg
peri 85.29430866121619 5.0942e-05 deg
M 111.4358863501685 2.5783e-05 deg
tp 2458719.300602477107
(2019-Aug-23.80060248)
0.00011105 TDB
period 1554.54215676887
4.26
9.6833e-06
2.651e-08
d
yr
n .231579438635658 1.4425e-09 deg/d
Q 2.838926061016401 1.1789e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1132  
   data-arc span      17282 days (47.32 yr)  
   first obs. used      1973-09-19  
   last obs. used      2021-01-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53943  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:08:53  

Additional Information
 Earth MOID = 1.40051 au 
 Jupiter MOID = 2.24279 au 
 T_jup = 3.393 
[ 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 15.27   n/a E2021B10  
diameter diameter 2.347 km 0.260 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.321   0.052 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

12955 (2162 T-2)          Discovered 1973-Sep-29 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 19991222/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 2162 T-2 = 1998 MX13 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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