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JPL Small-Body Database Browser
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12950 (4321 T-1)
Classification: Main-belt Asteroid          SPK-ID: 2012950
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1486948215147783 3.6639e-08  
a 2.622861475243305 1.1189e-08 au
q 2.232855556324014 9.6466e-08 au
i 2.547993422522397 3.7699e-06 deg
node 59.56979051016459 9.4116e-05 deg
peri 76.25319583658496 9.5037e-05 deg
M 155.3022290261284 1.516e-05 deg
tp 2457931.175616659348
(2017-Jun-26.67561666)
6.3243e-05 TDB
period 1551.53457560545
4.25
9.9282e-06
2.718e-08
d
yr
n .2320283451366325 1.4847e-09 deg/d
Q 3.012867394162596 1.2853e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1263  
   data-arc span      17755 days (48.61 yr)  
   first obs. used      1971-03-24  
   last obs. used      2019-11-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53322  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 22:51:21  

Additional Information
 Earth MOID = 1.24884 au 
 Jupiter MOID = 2.02166 au 
 T_jup = 3.387 
[ 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 14.4   n/a MPO435824  
diameter diameter 7.277 km 0.216 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.058   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

12950 (4321 T-1)          Discovered 1971-Mar-26 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
 4321 T-1 = 1986 TG7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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