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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3018231522669806 9.2384e-08  
a 2.549913648557397 1.4289e-08 AU
q 1.780290673141206 2.4104e-07 AU
i 8.761117992637331 5.8478e-06 deg
node 93.21174598910646 5.5475e-05 deg
peri 316.1405687277701 5.6424e-05 deg
M 121.4579452421534 1.2538e-05 deg
tp 2456298.723790899525
(2013-Jan-06.22379090)
4.9009e-05 JED
period 1487.259107800861
4.07
1.2502e-05
3.423e-08
d
yr
n .2420560063218 2.0347e-09 deg/d
Q 3.319536623973588 1.8602e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1003  
   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      .4755  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 12:17:19  

Additional Information
 Earth MOID = .801959 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. 2013-Sep-12) 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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