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8641 (1987 BM1)
Classification: Main-belt Asteroid          SPK-ID: 2008641
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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1087772248618241 3.1977e-08  
a 3.017240173109665 1.771e-08 au
q 2.689033160337186 9.1623e-08 au
i 14.4848460044583 4.1205e-06 deg
node 93.06500722985902 1.5434e-05 deg
peri 49.61505760132014 2.6049e-05 deg
M 136.4364447798472 2.0348e-05 deg
tp 2458274.993776005924
(2018-Jun-05.49377601)
0.0001081 TDB
period 1914.314324587607
5.24
1.6854e-05
4.614e-08
d
yr
n .1880568908544073 1.6557e-09 deg/d
Q 3.345447185882145 1.9636e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1769  
   data-arc span      12195 days (33.39 yr)  
   first obs. used      1987-01-27  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45432  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 16:50:51  

Additional Information
 Earth MOID = 1.72742 au 
 Jupiter MOID = 1.8379 au 
 T_jup = 3.190 
[ 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 13.0   n/a MPO263426  
diameter diameter 13.633 km 0.317 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.079   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

8641 (1987 BM1)          Discovered 1987-Jan-27 by Jensen, P. at Brorfelde
Reference: 19980511/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1987 BM1 = 1990 VT9 = 1996 YE3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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