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11666 Bracker (1997 MD8)
Classification: Main-belt Asteroid          SPK-ID: 2011666
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .163009604217574 3.376e-08  
a 2.403861896122934 9.3258e-09 au
q 2.012009319842228 7.9534e-08 au
i 1.364908969432193 4.2085e-06 deg
node 188.3257916895696 0.00016053 deg
peri 336.2000028608152 0.00016107 deg
M 181.6899496911668 1.4585e-05 deg
tp 2459674.773387096503
(2022-Apr-05.27338710)
5.7131e-05 TDB
period 1361.327748684484
3.73
7.9219e-06
2.169e-08
d
yr
n .2644477058135964 1.5389e-09 deg/d
Q 2.79571447240364 1.0846e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1656  
   data-arc span      25379 days (69.48 yr)  
   first obs. used      1951-02-04  
   last obs. used      2020-07-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49869  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 00:26:42  

Additional Information
 Earth MOID = 1.01961 au 
 Jupiter MOID = 2.18063 au 
 T_jup = 3.505 
[ 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 14.2   n/a MPO384860  
diameter diameter 4.402 km 1.878 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.209   0.217 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

11666 Bracker           Discovered 1997 June 29 by Spacewatch at Kitt Peak.
Steve Bracker (b. 1942) is a renaissance man---particle physicist, harpsichordist, astronomer, naturalist and software guru. The very first programmer with the Cerro Tololo Inter-American Observatory in Chile, he continued his involvement in astronomy with the Sloan Digital Sky Survey.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020427/MPCPages.arcLast Updated: 2003-10-02

Alternate Designations
 1997 MD8 = 1990 SO13 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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