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18330 (1987 BW1)
Classification: Main-belt Asteroid          SPK-ID: 2018330
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1534262586855041 3.2093e-08  
a 2.312093949612098 7.8078e-09 au
q 1.957358025193723 7.4771e-08 au
i 3.993495932642506 3.5872e-06 deg
node 243.2053556717825 5.8617e-05 deg
peri 212.1831483337355 6.0436e-05 deg
M 257.3449120124283 1.6383e-05 deg
tp 2459566.671569481601
(2021-Dec-18.17156948)		 5.944e-05 TDB
period 1284.123053202542
3.52		 6.5046e-06
1.781e-08		 d
yr
n .2803469644923648 1.4201e-09 deg/d
Q 2.666829874030473 9.0057e-09 au
   Orbit Determination Parameters
   # obs. used (total)      1415  
   data-arc span      12366 days (33.86 yr)  
   first obs. used      1987-01-25  
   last obs. used      2020-12-03  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50307  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:26:37  

Additional Information
 Earth MOID = .975196 au 
 Jupiter MOID = 2.50558 au 
 T_jup = 3.565 
[ show covariance matrix ]

[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.04   n/a E2021B10  
diameter diameter 2.225 km 0.558 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.225   0.097 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18330 (1987 BW1)          Discovered 1987-Jan-25 by Elst, E. W. at La Silla
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1987 BW1 = 1987 CK = 1996 TR8 = 1998 FH126 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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