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5502 Brashear (1984 EC)
Classification: Main-belt Asteroid          SPK-ID: 2005502
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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1269112144536386 3.4871e-08  
a 2.67341308287142 1.2727e-08 au
q 2.334126981787962 9.059e-08 au
i 12.33741676467162 4.7899e-06 deg
node 352.42934214 1.6885e-05 deg
peri 232.1344494333628 2.6105e-05 deg
M 97.63163191196413 1.8741e-05 deg
tp 2458767.502311195181
(2019-Oct-11.00231120)
8.3637e-05 TDB
period 1596.605166963646
4.37
1.1401e-05
3.121e-08
d
yr
n .2254784134794154 1.6101e-09 deg/d
Q 3.012699183954878 1.4342e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2130  
   data-arc span      14345 days (39.27 yr)  
   first obs. used      1981-09-03  
   last obs. used      2020-12-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44548  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 01:25:09  

Additional Information
 Earth MOID = 1.34849 au 
 Jupiter MOID = 2.03539 au 
 T_jup = 3.335 
[ 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 13.03   n/a E2021B10  
diameter diameter 6.465 km 0.140 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 19.2922 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.]
geometric albedo albedo 0.321   0.047 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

5502 Brashear (1984 EC)          Discovered 1984-Mar-01 by Bowell, E. at Flagstaff
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1984 EC = 1986 TQ17 = 1990 RU1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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