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3912 Troja (1988 SG)
Classification: Main-belt Asteroid          SPK-ID: 2003912
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03152639657934679 2.8775e-08  
a 2.37526071865184 7.7916e-09 au
q 2.300377307256278 6.8561e-08 au
i 2.401936085126798 3.8774e-06 deg
node 26.19610570145209 8.2864e-05 deg
peri 59.07076107042872 0.00010782 deg
M 148.7202568370378 6.87e-05 deg
tp 2458448.126312364525
(2018-Nov-25.62631236)
0.00025467 TDB
period 1337.104519437916
3.66
6.5792e-06
1.801e-08
d
yr
n .269238488664547 1.3248e-09 deg/d
Q 2.450144130047402 8.0372e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2396  
   data-arc span      30038 days (82.24 yr)  
   first obs. used      1937-11-07  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45783  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:59:02  

Additional Information
 Earth MOID = 1.31741 au 
 Jupiter MOID = 2.59184 au 
 T_jup = 3.540 
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Orbital Elements at Epoch 2456435.5 (2013-May-23.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03093897699691214 2.881e-08  
q 2.302314091383248 6.8616e-08 au
tp 2455776.204880365612
(2011-Aug-02.70488037)
0.00025739 TDB
node 26.23259989281922 8.2882e-05 deg
peri 59.83869318299815 0.0001086 deg
i 2.402093552043429 3.8757e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2396  
   data-arc span      30038 days (82.24 yr)  
   first obs. used      1937-11-07  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45783  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:59:02  

Additional Information
 Jupiter MOID = 2.59184 au 
 T_jup = 3.540 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.299973832150759E-16 -1.964611745529905E-15 -1.317357799155601E-13 5.210940388385044E-15 -4.921105107701019E-14 -7.029210525042039E-17
q -1.964611745529905E-15 4.708102936944775E-15 5.333419666183526E-13 -1.32726216722996E-14 1.829881737927126E-13 2.032392194862165E-16
tp -1.317357799155601E-13 5.333419666183526E-13 6.625132059330498E-8 -8.943439898758895E-11 1.807215340355928E-8 2.432002590519832E-12
node 5.210940388385044E-15 -1.32726216722996E-14 -8.943439898758895E-11 6.869385176574136E-9 -6.887366625041992E-9 -6.377140483649717E-11
peri -4.921105107701019E-14 1.829881737927126E-13 1.807215340355928E-8 -6.887366625041992E-9 1.179385610006444E-8 6.437902776576314E-11
i -7.029210525042039E-17 2.032392194862165E-16 2.432002590519832E-12 -6.377140483649717E-11 6.437902776576314E-11 1.502079616361208E-11

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 13.1   n/a MPO431542  
diameter diameter 5.930 km 0.158 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.328   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

3912 Troja (1988 SG)          Discovered 1988-Sep-16 by Elst, E. W. at Haute Provence
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1988 SG = 1937 VJ = 1970 SZ = 1970 WK = 1977 RE9 = 1981 UC14 = 1985 XD 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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