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7569 (1989 BK)
Classification: Main-belt Asteroid          SPK-ID: 2007569
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .301690428528731 9.2344e-08  
a 2.550111282727445 1.4249e-08 AU
q 1.78076711704545 2.4094e-07 AU
i 8.761059676426196 5.8449e-06 deg
node 93.21220702930718 5.5468e-05 deg
peri 316.1361821269537 5.6419e-05 deg
M 169.8809890546446 1.2825e-05 deg
tp 2456298.593270771364
(2013-Jan-06.09327077)
4.9035e-05 JED
period 1487.432018900178
4.07
1.2466e-05
3.413e-08
d
yr
n .242027867778581 2.0285e-09 deg/d
Q 3.319455448409439 1.8547e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1012  
   data-arc span      21431 days (58.67 yr)  
   first obs. used      1955-10-23  
   last obs. used      2014-06-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .47371  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Aug-13 14:10:46  

Additional Information
 Earth MOID = .803171 AU 
 T_jup = 3.360 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.9 mag n/a MPO279595  
rotation period rot_per 3.60 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Carbo, L.; Green, D.; Kragh, K.; Krotz, J.; et al. (2009) Minor Planet Bul. 36, 152-157.]
[Simpson, G.; Chong, E.; Gerhardt, M.; Gorsky, S.; et al. (2013) Minor Planet Bul. 146-151.]

7569 (1989 BK)          Discovered 1989-Jan-28 by Oshima, Y. at Gekko
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1989 BK = 1951 WL = 1955 VY = 1993 BK 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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