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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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1269112081469848 2.1752e-08  
a 2.673413076841068 1.1995e-08 au
q 2.33412699338322 5.6279e-08 au
i 12.33741878810265 3.6449e-07 deg
node 352.429382370579 6.3482e-06 deg
peri 232.1344363789202 1.1594e-05 deg
M 97.63160770420143 7.7458e-06 deg
tp 2458767.502420022009
(2019-Oct-11.00242002)
3.3459e-05 TDB
period 1596.605161561511
4.37
1.0746e-05
2.942e-08
d
yr
n .2254784142423246 1.5176e-09 deg/d
Q 3.012699160298915 1.3518e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2162  
   data-arc span      14345 days (39.27 yr)  
   first obs. used      1981-09-03  
   last obs. used      2020-12-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44641  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 17:37:23  

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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