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9954 Brachiosaurus (1991 GX7)
Classification: Main-belt Asteroid          SPK-ID: 2009954
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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1291667940797955 2.5617e-08  
a 2.759239812819421 1.1875e-08 au
q 2.402837652100201 7.4886e-08 au
i 9.076830813155102 9.9664e-07 deg
node 3.44749895661741 7.0636e-06 deg
peri 48.61272154366257 1.5057e-05 deg
M 318.8608646283799 1.1798e-05 deg
tp 2459391.808936576955
(2021-Jun-26.30893658)
5.5147e-05 TDB
period 1674.10463408073
4.58
1.0808e-05
2.959e-08
d
yr
n .215040322254218 1.3883e-09 deg/d
Q 3.11564197353864 1.3409e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2059  
   data-arc span      13231 days (36.22 yr)  
   first obs. used      1984-11-21  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4358  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 21:44:01  

Additional Information
 Earth MOID = 1.42274 au 
 Jupiter MOID = 2.31683 au 
 T_jup = 3.312 
[ 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 13.42   n/a E2021B10  
rotation period rot_per 8.78889 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]

9954 Brachiosaurus           Discovered 1991 Apr. 8 by E. W. Elst at the European Southern Observatory.
Brachiosaurus, the heaviest of all dinosaurs (about 70 tons) had a very long neck with a small head. Preferring swampy areas, where the water would have supported its weight, it lived during in Jurassic--Lower Cretaceous times.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20021120/MPCPages.arcLast Updated: 2003-10-02

Alternate Designations
 1991 GX7 = 1984 WP5 = 1993 UO3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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