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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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03152639188325444 2.8304e-08  
a 2.375260721311047 7.2353e-09 au
q 2.300377320986093 6.6878e-08 au
i 2.401933349936889 3.6249e-06 deg
node 26.19619992684851 6.8221e-05 deg
peri 59.0706373638054 9.1315e-05 deg
M 148.7202842021782 6.1827e-05 deg
tp 2458448.126209797880
(2018-Nov-25.62620980)
0.00022859 TDB
period 1337.104521683336
3.66
6.1095e-06
1.673e-08
d
yr
n .2692384882124108 1.2302e-09 deg/d
Q 2.450144121636001 7.4634e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2678  
   data-arc span      30173 days (82.61 yr)  
   first obs. used      1937-11-07  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44087  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 16:02:56  

Additional Information
 Earth MOID = 1.31741 au 
 Jupiter MOID = 2.59184 au 
 T_jup = 3.540 
[ 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 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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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1976-Sep-08 03:31 < 00:01 Thisb 0.0469397013730986 0.0469361365563164 0.0469432661957527 3.77960281863976 3.77960278020818 2443029.646637999 0.626444295964342 179.702249951737 40.0604910903104 8.8497968984988 47065.2132104819 T 30 CATAB v2.0f-lin.ifort 2020-Jun-23 16:03:11 2020-Jun-23 16:03
2119-Jul-11 22:14 00:02 Thisb 0.0258525690122794 0.0258476495782497 0.0258574934003175 3.4875020974544 3.48750202183094 2495200.426160059 2.44390200910166 621.266200119356 38.073295700934 -67.0046228691284 93469.2020071162 T 30 CATAB v2.0f-lin.ifort 2020-Jun-23 16:03:11 2020-Jun-23 16:03

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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