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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 ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2076767827678095 4.0224e-08  
a 2.860105593611395 1.7386e-08 au
q 2.266128065553965 1.1555e-07 au
i 14.97206911245986 4.3197e-06 deg
node 105.1404504819909 1.5886e-05 deg
peri 304.9351939106875 1.8432e-05 deg
M 213.5537248371617 1.2436e-05 deg
tp 2459719.199523765201
(2022-May-19.69952377)
6.5365e-05 TDB
period 1766.735468469788
4.84
1.611e-05
4.411e-08
d
yr
n .2037656493712693 1.858e-09 deg/d
Q 3.454083121668826 2.0997e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1183  
   data-arc span      7815 days (21.40 yr)  
   first obs. used      1999-01-24  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51788  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 23:49:38  

Additional Information
 Earth MOID = 1.31364 au 
 Jupiter MOID = 1.99949 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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