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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3013697264294989 8.2268e-08  
a 2.551067044763249 1.4157e-08 au
q 1.782252667379638 2.1544e-07 au
i 8.759231287645864 5.7732e-06 deg
node 93.21182243308773 4.6626e-05 deg
peri 316.0810955401142 4.7285e-05 deg
M 315.1086533388178 1.2403e-05 deg
tp 2457786.084357841138
(2017-Feb-01.58435784)
5.2493e-05 JED
period 1488.268314315932
4.07
1.2389e-05
3.392e-08
d
yr
n .2418918662294241 2.0136e-09 deg/d
Q 3.31988142214686 1.8424e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1143  
   data-arc span      21845 days (59.81 yr)  
   first obs. used      1955-10-23  
   last obs. used      2015-08-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .46531  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Feb-25 18:25:06  

Additional Information
 Earth MOID = .803463 au 
 Jupiter MOID = 2.09779 au 
 T_jup = 3.359 
[ 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 13.0 mag n/a MPO344362  
rotation period rot_per 3.60 h n/a LCDB (Rev. 2016-February); Warner et al., 2009 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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