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5251 Bradwood (1985 KA)
Classification: Main-belt Asteroid          SPK-ID: 2005251
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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2942169313090127 3.8983e-08  
a 2.360623824492169 7.9418e-09 au
q 1.666088326875138 9.1433e-08 au
i 22.18907060147978 4.4525e-06 deg
node 250.0125865300857 1.1478e-05 deg
peri 80.28079158121191 1.3031e-05 deg
M 175.2267319234057 6.7434e-06 deg
tp 2458355.683018637953
(2018-Aug-25.18301864)
2.4121e-05 TDB
period 1324.7642682271
3.63
6.6854e-06
1.83e-08
d
yr
n .2717464598300038 1.3714e-09 deg/d
Q 3.0551593221092 1.0278e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1347  
   data-arc span      14249 days (39.01 yr)  
   first obs. used      1981-04-25  
   last obs. used      2020-04-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45904  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:44:56  

Additional Information
 Earth MOID = .801752 au 
 Jupiter MOID = 2.60399 au 
 T_jup = 3.396 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457255.5 (2015-Aug-21.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2951582272784846 3.9054e-08  
q 1.663334008672251 9.1668e-08 au
tp 2457030.760095637099
(2015-Jan-08.26009564)
2.3798e-05 TDB
node 250.095578175381 1.1489e-05 deg
peri 80.16597395682393 1.3012e-05 deg
i 22.18055700116588 4.4518e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1347  
   data-arc span      14249 days (39.01 yr)  
   first obs. used      1981-04-25  
   last obs. used      2020-04-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45904  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:44:56  

Additional Information
 Jupiter MOID = 2.60399 au 
 T_jup = 3.396 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.525220923213317E-15 -3.573512166747431E-15 -2.440738120164241E-14 3.564014139521197E-16 -4.220153666106892E-15 -7.556731704544306E-15
q -3.573512166747431E-15 8.402980459285796E-15 4.150844246594699E-14 1.804766600081422E-16 5.238869816843806E-15 1.839313873311523E-14
tp -2.440738120164241E-14 4.150844246594699E-14 5.663513884201092E-10 -5.370661728092031E-13 1.614666240964388E-10 9.001290680639051E-14
node 3.564014139521197E-16 1.804766600081422E-16 -5.370661728092031E-13 1.320009900390363E-10 -1.222445550637585E-10 4.862236554986923E-12
peri -4.220153666106892E-15 5.238869816843806E-15 1.614666240964388E-10 -1.222445550637585E-10 1.693108661231075E-10 -4.618738190367032E-12
i -7.556731704544306E-15 1.839313873311523E-14 9.001290680639051E-14 4.862236554986923E-12 -4.618738190367032E-12 1.981872902021949E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.8   n/a MPO452240  
rotation period rot_per 4.296 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Warner, B.D. (2018) Minor Planet Bull. 45, 380-386.]

5251 Bradwood           Discovered 1985 May 18 by A. C. Gilmore and P. M. Kilmartin at Lake Tekapo.
Frank Bradshaw Wood (1915-1997) was a pioneer of photoelectric photometry and an expert on close binary stars. As a professor at the University of Pennsylvania, he supported the founding of Mt. John Observatory and promoted astronomical research there.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20051215/MPCPages.arcLast Updated: 2006-03-22
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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