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JPL Small-Body Database Browser
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74431 (1999 BK12)
Classification: Main-belt Asteroid          SPK-ID: 2074431
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2086426644296265 4.1439e-08  
a 2.857820332876756 1.8592e-08 au
q 2.261557084164187 1.1905e-07 au
i 14.97145606718449 4.6009e-06 deg
node 105.1466424086701 1.67e-05 deg
peri 305.000530586803 1.9334e-05 deg
M 131.883615077665 1.1967e-05 deg
tp 2457954.043730092138
(2017-Jul-19.54373009)
5.5602e-05 TDB
period 1764.618425342536
4.83
1.722e-05
4.715e-08
d
yr
n .2040101105314704 1.9909e-09 deg/d
Q 3.454083581589324 2.2471e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1086  
   data-arc span      7411 days (20.29 yr)  
   first obs. used      1999-01-24  
   last obs. used      2019-05-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52505  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 05:41:33  

Additional Information
 Earth MOID = 1.30873 au 
 Jupiter MOID = 1.99934 au 
 T_jup = 3.221 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.0   n/a MPO385285  
diameter diameter 4.467 km 0.873 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.244   0.153 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

74431 (1999 BK12)          Discovered 1999-Jan-24 by Farra d'Isonzo at Farra d'Isonzo
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 BK12 = 2000 HB81 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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