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30774 (1987 BU1)
Classification: Main-belt Asteroid          SPK-ID: 2030774
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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1767117661722084 3.035e-08  
a 2.420281373223629 6.476e-09 au
q 1.992589177127583 7.2397e-08 au
i 3.425574815429353 3.1276e-06 deg
node 241.2562894783168 6.5416e-05 deg
peri 212.4686313926995 6.624e-05 deg
M 23.9251266225081 1.075e-05 deg
tp 2459109.099418517059
(2020-Sep-16.59941852)
4.0965e-05 TDB
period 1375.299276489655
3.77
5.5199e-06
1.511e-08
d
yr
n .2617612080178447 1.0506e-09 deg/d
Q 2.847973569319674 7.6204e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1387  
   data-arc span      12473 days (34.15 yr)  
   first obs. used      1987-01-25  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4884  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 04:31:28  

Additional Information
 Earth MOID = 1.01002 au 
 Jupiter MOID = 2.34116 au 
 T_jup = 3.490 
[ 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 15.06   n/a MPCxxxxx  
diameter diameter 5.411 km 0.115 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.080   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

30774 (1987 BU1)          Discovered 1987-Jan-25 by Elst, E. W. at La Silla
Reference: 20011130/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1987 BU1 = 1993 TB8 = 1997 VG3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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