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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2433279887600814 3.5777e-08  
a 2.197636218492184 5.7348e-09 au
q 1.662889817420171 7.9211e-08 au
i 1.185275396039897 3.9642e-06 deg
node 226.5670706477981 0.00019336 deg
peri 109.7370604889592 0.00019352 deg
M 131.543213437063 9.9058e-06 deg
tp 2458565.691446460282
(2019-Mar-23.19144646)
3.1775e-05 TDB
period 1189.959369125423
3.26
4.6579e-06
1.275e-08
d
yr
n .3025313379099547 1.1842e-09 deg/d
Q 2.732382619564198 7.1303e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1624  
   data-arc span      21950 days (60.10 yr)  
   first obs. used      1960-09-24  
   last obs. used      2020-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53743  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:28:06  

Additional Information
 Earth MOID = .653863 au 
 Jupiter MOID = 2.65564 au 
 T_jup = 3.628 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456184.5 (2012-Sep-14.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2427258093662048 3.5719e-08  
q 1.664080556025014 7.9015e-08 au
tp 2456186.151106774315
(2012-Sep-15.65110677)
2.7925e-05 TDB
node 226.6877876707612 0.00019341 deg
peri 109.6476739869434 0.00019357 deg
i 1.184243966748587 3.9661e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1624  
   data-arc span      21950 days (60.10 yr)  
   first obs. used      1960-09-24  
   last obs. used      2020-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53743  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:28:06  

Additional Information
 Jupiter MOID = 2.65564 au 
 T_jup = 3.628 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.275862182610985E-15 -2.81816477440779E-15 -9.966909699317581E-14 -4.423495965027856E-16 -9.895385627023142E-15 -2.645198719783903E-16
q -2.81816477440779E-15 6.243401571538062E-15 2.536039506150192E-13 1.323692958031025E-15 2.970165614460287E-14 5.905545819220546E-16
tp -9.966909699317581E-14 2.536039506150192E-13 7.798002725880274E-10 -3.172177230743045E-12 2.342194635331028E-10 9.099094499117995E-14
node -4.423495965027856E-16 1.323692958031025E-15 -3.172177230743045E-12 3.740782419833933E-8 -3.740036019861645E-8 -1.325803037018421E-11
peri -9.895385627023142E-15 2.970165614460287E-14 2.342194635331028E-10 -3.740036019861645E-8 3.747034834146565E-8 1.328111699153059E-11
i -2.645198719783903E-16 5.905545819220546E-16 9.099094499117995E-14 -1.325803037018421E-11 1.328111699153059E-11 1.57300653605573E-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 14.8   n/a MPO448987  
rotation period rot_per 6.10802 h n/a LCDB (Rev. 2020-October); 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

[ show close-approach data ]
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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