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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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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1099812510587793 1.8013e-08  
a 3.015277240976164 1.5763e-08 au
q 2.683653277724541 5.4526e-08 au
i 14.46560701611364 9.035e-07 deg
node 93.01954640496724 2.6577e-06 deg
peri 50.10453845409616 8.8871e-06 deg
M 173.4675240501154 1.0874e-05 deg
tp 2458278.979543541013
(2018-Jun-09.47954354)
5.4651e-05 TDB
period 1912.446529353772
5.24
1.4997e-05
4.106e-08
d
yr
n .1882405570427353 1.4761e-09 deg/d
Q 3.346901204227787 1.7497e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1950  
   data-arc span      12339 days (33.78 yr)  
   first obs. used      1987-01-27  
   last obs. used      2020-11-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45132  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 20:46:14  

Additional Information
 Earth MOID = 1.72229 au 
 Jupiter MOID = 1.83653 au 
 T_jup = 3.191 
[ 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 13.02   n/a E2021B10  
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

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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1927-Aug-07 08:50 00:02 Jupiter 1.92653731836054 1.92653674836149 1.92653788836606 2.08484432462167 1.86205657854389 2425099.867740501 2.3577509351085 198.095315625615 4.46441288732311 83.4811848984306 5833480.31684927 T 36 CATAB v2.0f-lin.ifort 2021-Apr-12 20:47:19 2021-Apr-12 20:47
1974-Jan-07 13:48 < 00:01 Jupiter 1.83676062639954 1.83676043120543 1.83676082159406 3.01920177514284 2.86239043105729 2442055.075324597 0.977953123098073 73.6488869836804 6.16933655658865 79.0367761082429 8123833.97042002 T 36 CATAB v2.0f-lin.ifort 2021-Apr-12 20:47:19 2021-Apr-12 20:47
2020-Jul-24 01:16 < 00:01 Jupiter 1.8937673541064 1.89376719446728 1.89376751374552 3.98680733653654 3.87299570227232 2459054.552452019 0.125966852409493 16.2870656861317 7.08327446929324 83.3265164542821 11691540.2564509 T 36 CATAB v2.0f-lin.ifort 2021-Apr-12 20:47:19 2021-Apr-12 20:47
2058-Feb-17 05:14 00:01 Jupiter 1.92193456056091 1.92193435782655 1.92193476329604 2.0139264001872 1.78170495341604 2472776.718029331 1.16485078092087 118.751135816158 7.07001144100717 89.632542449275 5791874.99455267 T 36 CATAB v2.0f-lin.ifort 2021-Apr-12 20:47:19 2021-Apr-12 20:47
2104-Jul-15 15:42 00:02 Jupiter 1.85126735875815 1.85126720118884 1.85126751632778 2.89955408968645 2.73721405554567 2489726.153915175 2.14309912746028 151.887063609015 5.79741686534317 80.4808690442156 7624946.0704705 T 36 CATAB v2.0f-lin.ifort 2021-Apr-12 20:47:19 2021-Apr-12 20:47
2151-Jan-27 08:49 00:03 Jupiter 1.90662773510282 1.90662680211261 1.90662866810452 3.95229386928268 3.8382448509175 2506722.867304835 2.9300731440102 245.305058561171 7.68003078389173 -81.26976956248 11690601.976049 T 36 CATAB v2.0f-lin.ifort 2021-Apr-12 20:47:19 2021-Apr-12 20:47
2188-Aug-31 18:58 00:05 Jupiter 1.91157185737732 1.91157124992696 1.91157246487504 1.9725117663369 1.73337745887538 2520454.290585821 4.69354104856204 541.508550062958 9.74954669165432 -83.4566602458803 5084347.37051995 T 36 CATAB v2.0f-lin.ifort 2021-Apr-12 20:47:19 2021-Apr-12 20:47

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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