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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08110910032723286 3.9003e-08  
a 2.626235260921735 1.3025e-08 au
q 2.413223681660717 1.0523e-07 au
i 4.446509562376034 4.2103e-06 deg
node 192.832612611534 5.6155e-05 deg
peri 85.28551289682548 6.2042e-05 deg
M 65.11371199347647 2.5979e-05 deg
tp 2458719.330102589395
(2019-Aug-23.83010259)
0.00011218 TDB
period 1554.529145534796
4.26
1.1564e-05
3.166e-08
d
yr
n .2315813769295082 1.7228e-09 deg/d
Q 2.839246840182752 1.4081e-08 au
  Orbit Determination Parameters
   # obs. used (total)      932  
   data-arc span      17115 days (46.86 yr)  
   first obs. used      1973-09-19  
   last obs. used      2020-07-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56699  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 00:38:54  

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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