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11904 (1991 TR1)
Classification: Inner Main-belt Asteroid          SPK-ID: 2011904
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09908649607566063 1.3693e-08  
a 1.920630046133829 4.3983e-09 au
q 1.730321544604793 2.6354e-08 au
i 19.63012980650497 8.5567e-07 deg
node 223.626619648402 2.7708e-06 deg
peri 145.7963822640473 1.4798e-05 deg
M 77.22225712677157 1.2785e-05 deg
tp 2459187.952976605554
(2020-Dec-04.45297661)
3.4385e-05 TDB
period 972.2187775313387
2.66
3.3396e-06
9.143e-09
d
yr
n .3702870262536106 1.2719e-09 deg/d
Q 2.110938547662864 4.8341e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1678  
   data-arc span      10714 days (29.33 yr)  
   first obs. used      1991-10-13  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44598  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 13:16:58  

Additional Information
 Earth MOID = .752695 au 
 Jupiter MOID = 3.2255 au 
 T_jup = 3.848 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.07   n/a E2021B10  
rotation period rot_per 18.233 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Warner, B.D. (2013). Minor Planet Bull. 40, 26-29.]

11904 (1991 TR1)          Discovered 1991-Oct-13 by Lawrence, K. J. at Palomar
Reference: 19991026/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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