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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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1291667565909038 3.674e-08  
a 2.759239818992795 1.2535e-08 au
q 2.402837760917024 1.0674e-07 au
i 9.076830189366335 4.4127e-06 deg
node 3.447463644267307 2.2449e-05 deg
peri 48.61275629369436 2.8634e-05 deg
M 318.86086439177 1.8283e-05 deg
tp 2459391.808938319296
(2021-Jun-26.30893832)
8.5402e-05 TDB
period 1674.104639699058
4.58
1.1408e-05
3.123e-08
d
yr
n .2150403215325385 1.4654e-09 deg/d
Q 3.115641877068567 1.4154e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1995  
   data-arc span      13208 days (36.16 yr)  
   first obs. used      1984-11-21  
   last obs. used      2021-01-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43617  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 01:51:53  

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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