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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08110914434282822 4.0973e-08  
a 2.626235256107018 1.3556e-08 au
q 2.413223561641209 1.1135e-07 au
i 4.446507749799223 4.2153e-06 deg
node 192.8325499913512 5.7981e-05 deg
peri 85.28556585531854 6.3717e-05 deg
M 65.11372372642556 2.5993e-05 deg
tp 2458719.330052698129
(2019-Aug-23.83005270)
0.00011226 TDB
period 1554.529141259884
4.26
1.2036e-05
3.295e-08
d
yr
n .2315813775663507 1.793e-09 deg/d
Q 2.839246950572827 1.4655e-08 au
  Orbit Determination Parameters
   # obs. used (total)      906  
   data-arc span      16771 days (45.92 yr)  
   first obs. used      1973-09-19  
   last obs. used      2019-08-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56942  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 01:13:42  

Additional Information
 Earth MOID = 1.40202 au 
 Jupiter MOID = 2.24366 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 15.2   n/a MPO449039  
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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