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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 ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1521812312954209 6.1006e-08  
a 3.044570223692263 3.8064e-08 au
q 2.581243778285399 1.7586e-07 au
i 9.587315930442072 8.3734e-06 deg
node 16.5102677915403 4.7574e-05 deg
peri 45.31212974457211 6.4715e-05 deg
M 264.1730133940545 3.9514e-05 deg
tp 2459517.002884154494
(2021-Oct-29.50288415)
0.00021395 TDB
period 1940.382817840597
5.31
3.6389e-05
9.963e-08
d
yr
n .1855303998211214 3.4793e-09 deg/d
Q 3.507896669099126 4.3857e-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 = 1.60391 au 
 Jupiter MOID = 1.93831 au 
 T_jup = 3.200 
[ 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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