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JPL Small-Body Database Browser
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7445 Trajanus (4116 P-L)
Classification: Mars-crossing Asteroid          SPK-ID: 2007445
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2433279873450662 3.6386e-08  
a 2.197636218661533 5.7923e-09 au
q 1.662889820658 8.0652e-08 au
i 1.185275582977478 4.0071e-06 deg
node 226.567062664502 0.00019441 deg
peri 109.737068437821 0.00019457 deg
M 131.5432132733192 9.9276e-06 deg
tp 2458565.691446951269
(2019-Mar-23.19144695)
3.1836e-05 TDB
period 1189.959369262969
3.26
4.7046e-06
1.288e-08
d
yr
n .3025313378749855 1.1961e-09 deg/d
Q 2.732382616665065 7.2018e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1576  
   data-arc span      21652 days (59.28 yr)  
   first obs. used      1960-09-24  
   last obs. used      2020-01-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54245  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 20:50:48  

Additional Information
 Earth MOID = .653863 au 
 Jupiter MOID = 2.65564 au 
 T_jup = 3.628 
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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 14.8   n/a MPO448987  
rotation period rot_per 6.10802 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]

7445 Trajanus (4116 P-L)          Discovered 1960-Sep-24 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 4116 P-L = 1986 RL1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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