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312939 (1994 SW12)
Classification: Main-belt Asteroid          SPK-ID: 2312939
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 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1526156911771195 6.2682e-08  
a 3.048193445296985 3.5619e-08 au
q 2.582991295801421 1.8312e-07 au
i 9.601408172683165 8.3658e-06 deg
node 16.88299841292942 4.7479e-05 deg
peri 44.06517254250405 6.4345e-05 deg
M 191.1654291709435 3.8778e-05 deg
tp 2459512.135212209131
(2021-Oct-24.63521221)
0.00021328 TDB
period 1943.847606469029
5.32
3.4072e-05
9.328e-08
d
yr
n .1851997033110711 3.2462e-09 deg/d
Q 3.51339559479255 4.1055e-08 au
  Orbit Determination Parameters
   # obs. used (total)      129  
   data-arc span      8599 days (23.54 yr)  
   first obs. used      1994-09-29  
   last obs. used      2018-04-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .6375  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-04 10:53:53  

Additional Information
 Earth MOID = 1.60465 au 
 Jupiter MOID = 1.93409 au 
 T_jup = 3.199 
[ 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 16.4   n/a MPO440463  
diameter diameter 3.686 km 0.700 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.030   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

312939 (1994 SW12)          Discovered 1994-Sep-29 by Spacewatch at Kitt Peak
Reference: 20120207/Numbers.arcLast Updated: 2012-02-09

[ show close-approach data ]
Alternate Designations
 1994 SW12 = 2007 DY93 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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